./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 544bc30a09daedadbc71b7b1e61d9c7323ad28b5465f4ffee45b30f96e266ba6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:31:16,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:31:16,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:31:16,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:31:16,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:31:16,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:31:16,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:31:16,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:31:16,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:31:16,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:31:16,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:31:16,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:31:16,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:31:16,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:31:16,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:31:16,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:31:16,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:31:16,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:31:16,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:31:16,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:31:16,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:31:16,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:31:16,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:31:16,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:31:16,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:31:16,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:31:16,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:31:16,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:31:16,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:31:16,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:31:16,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:31:16,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:31:16,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:31:16,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:31:16,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:31:16,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:31:16,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:31:16,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:31:16,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:31:16,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:31:16,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:31:16,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:31:16,395 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:31:16,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:31:16,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:31:16,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:31:16,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:31:16,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:31:16,397 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:31:16,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:31:16,397 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:31:16,405 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:31:16,406 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:31:16,406 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:31:16,407 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:31:16,407 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:31:16,407 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:31:16,407 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:31:16,408 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:31:16,408 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:31:16,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:31:16,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:31:16,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:31:16,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:31:16,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:31:16,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:31:16,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:31:16,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:31:16,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:31:16,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:31:16,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:31:16,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:31:16,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:31:16,412 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:31:16,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:31:16,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:31:16,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:31:16,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:31:16,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:31:16,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:31:16,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544bc30a09daedadbc71b7b1e61d9c7323ad28b5465f4ffee45b30f96e266ba6 [2022-11-03 03:31:16,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:31:16,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:31:16,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:31:16,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:31:16,750 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:31:16,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c [2022-11-03 03:31:16,821 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/90b3cbb03/4a22eab93c47445b91c8ffd90988fcfa/FLAG5caabdaa2 [2022-11-03 03:31:17,596 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:31:17,598 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c [2022-11-03 03:31:17,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/90b3cbb03/4a22eab93c47445b91c8ffd90988fcfa/FLAG5caabdaa2 [2022-11-03 03:31:17,696 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/90b3cbb03/4a22eab93c47445b91c8ffd90988fcfa [2022-11-03 03:31:17,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:31:17,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:31:17,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:31:17,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:31:17,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:31:17,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:17" (1/1) ... [2022-11-03 03:31:17,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68796a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:17, skipping insertion in model container [2022-11-03 03:31:17,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:17" (1/1) ... [2022-11-03 03:31:17,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:31:17,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:31:18,003 WARN L230 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_1304c479-27ad-4281-9862-56ef03952848/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c[1014,1027] [2022-11-03 03:31:18,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:31:18,448 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:31:18,459 WARN L230 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_1304c479-27ad-4281-9862-56ef03952848/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c[1014,1027] [2022-11-03 03:31:18,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:31:18,631 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:31:18,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18 WrapperNode [2022-11-03 03:31:18,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:31:18,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:31:18,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:31:18,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:31:18,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:18,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,012 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2325 [2022-11-03 03:31:19,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:31:19,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:31:19,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:31:19,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:31:19,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:31:19,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:31:19,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:31:19,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:31:19,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (1/1) ... [2022-11-03 03:31:19,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:31:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:19,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:31:19,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:31:19,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:31:19,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:31:20,075 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:31:20,077 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:32:03,402 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:32:35,311 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:32:35,311 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:32:35,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:35 BoogieIcfgContainer [2022-11-03 03:32:35,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:32:35,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:32:35,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:32:35,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:32:35,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:31:17" (1/3) ... [2022-11-03 03:32:35,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152d9c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:35, skipping insertion in model container [2022-11-03 03:32:35,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:18" (2/3) ... [2022-11-03 03:32:35,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152d9c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:35, skipping insertion in model container [2022-11-03 03:32:35,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:35" (3/3) ... [2022-11-03 03:32:35,325 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.peterson.5.prop1-func-interl.c [2022-11-03 03:32:35,341 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:32:35,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:32:35,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:32:35,397 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=FINITE_AUTOMATA, 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;@4defa30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:32:35,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:32:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:32:35,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:35,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:32:35,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash 16661210, now seen corresponding path program 1 times [2022-11-03 03:32:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:35,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926530772] [2022-11-03 03:32:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:32:36,115 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:32:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:32:36,670 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:32:36,672 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:32:36,674 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:32:36,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:32:36,682 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:32:36,688 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:32:36,744 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:32:36,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:32:36 BoogieIcfgContainer [2022-11-03 03:32:36,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:32:36,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:32:36,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:32:36,779 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:32:36,781 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:35" (3/4) ... [2022-11-03 03:32:36,785 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:32:36,786 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:32:36,787 INFO L158 Benchmark]: Toolchain (without parser) took 79087.22ms. Allocated memory was 107.0MB in the beginning and 5.5GB in the end (delta: 5.4GB). Free memory was 80.2MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2022-11-03 03:32:36,788 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 79.7MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:32:36,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 931.05ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 48.4MB in the end (delta: 31.8MB). Peak memory consumption was 33.1MB. Max. memory is 16.1GB. [2022-11-03 03:32:36,792 INFO L158 Benchmark]: Boogie Procedure Inliner took 380.48ms. Allocated memory was 107.0MB in the beginning and 167.8MB in the end (delta: 60.8MB). Free memory was 48.4MB in the beginning and 95.8MB in the end (delta: -47.4MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. [2022-11-03 03:32:36,798 INFO L158 Benchmark]: Boogie Preprocessor took 331.71ms. Allocated memory is still 167.8MB. Free memory was 95.8MB in the beginning and 89.6MB in the end (delta: 6.2MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. [2022-11-03 03:32:36,799 INFO L158 Benchmark]: RCFGBuilder took 75967.37ms. Allocated memory was 167.8MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 89.6MB in the beginning and 4.5GB in the end (delta: -4.4GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-03 03:32:36,800 INFO L158 Benchmark]: TraceAbstraction took 1459.70ms. Allocated memory is still 5.5GB. Free memory was 4.5GB in the beginning and 4.4GB in the end (delta: 102.8MB). Peak memory consumption was 102.8MB. Max. memory is 16.1GB. [2022-11-03 03:32:36,801 INFO L158 Benchmark]: Witness Printer took 7.15ms. Allocated memory is still 5.5GB. Free memory was 4.4GB in the beginning and 4.4GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:32:36,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 79.7MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 931.05ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 48.4MB in the end (delta: 31.8MB). Peak memory consumption was 33.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 380.48ms. Allocated memory was 107.0MB in the beginning and 167.8MB in the end (delta: 60.8MB). Free memory was 48.4MB in the beginning and 95.8MB in the end (delta: -47.4MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 331.71ms. Allocated memory is still 167.8MB. Free memory was 95.8MB in the beginning and 89.6MB in the end (delta: 6.2MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. * RCFGBuilder took 75967.37ms. Allocated memory was 167.8MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 89.6MB in the beginning and 4.5GB in the end (delta: -4.4GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * TraceAbstraction took 1459.70ms. Allocated memory is still 5.5GB. Free memory was 4.5GB in the beginning and 4.4GB in the end (delta: 102.8MB). Peak memory consumption was 102.8MB. Max. memory is 16.1GB. * Witness Printer took 7.15ms. Allocated memory is still 5.5GB. Free memory was 4.4GB in the beginning and 4.4GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 277, overapproximation of bitwiseAnd at line 195. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_38 = 0; [L39] const SORT_4 var_81 = 1; [L40] const SORT_4 var_82 = 0; [L41] const SORT_2 var_94 = 0; [L42] const SORT_3 var_115 = 0; [L43] const SORT_2 var_120 = 3; [L44] const SORT_2 var_126 = 2; [L45] const SORT_2 var_132 = 1; [L46] const SORT_4 var_156 = 2; [L47] const SORT_4 var_170 = 3; [L48] const SORT_4 var_313 = 4; [L49] const SORT_2 var_338 = 4; [L51] SORT_1 input_93; [L52] SORT_1 input_95; [L53] SORT_1 input_99; [L54] SORT_1 input_100; [L55] SORT_1 input_104; [L56] SORT_1 input_105; [L57] SORT_1 input_109; [L58] SORT_1 input_110; [L59] SORT_1 input_114; [L60] SORT_1 input_121; [L61] SORT_1 input_127; [L62] SORT_1 input_133; [L63] SORT_1 input_184; [L64] SORT_1 input_187; [L65] SORT_1 input_191; [L66] SORT_1 input_198; [L67] SORT_1 input_201; [L68] SORT_1 input_205; [L69] SORT_1 input_212; [L70] SORT_1 input_215; [L71] SORT_1 input_219; [L72] SORT_1 input_226; [L73] SORT_1 input_229; [L74] SORT_1 input_233; [L75] SORT_1 input_243; [L76] SORT_1 input_261; [L77] SORT_1 input_279; [L78] SORT_1 input_297; [L80] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L81] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L82] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L83] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L84] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L85] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L86] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L87] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L88] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L89] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L90] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L91] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L92] SORT_2 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L93] SORT_2 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L94] SORT_2 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L95] SORT_2 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L96] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_2 init_7_arg_1 = var_5; [L119] state_6 = init_7_arg_1 [L120] SORT_2 init_9_arg_1 = var_5; [L121] state_8 = init_9_arg_1 [L122] SORT_2 init_11_arg_1 = var_5; [L123] state_10 = init_11_arg_1 [L124] SORT_2 init_13_arg_1 = var_5; [L125] state_12 = init_13_arg_1 [L126] SORT_2 init_15_arg_1 = var_5; [L127] state_14 = init_15_arg_1 [L128] SORT_2 init_17_arg_1 = var_5; [L129] state_16 = init_17_arg_1 [L130] SORT_2 init_19_arg_1 = var_5; [L131] state_18 = init_19_arg_1 [L132] SORT_2 init_21_arg_1 = var_5; [L133] state_20 = init_21_arg_1 [L134] SORT_2 init_23_arg_1 = var_5; [L135] state_22 = init_23_arg_1 [L136] SORT_2 init_25_arg_1 = var_5; [L137] state_24 = init_25_arg_1 [L138] SORT_2 init_27_arg_1 = var_5; [L139] state_26 = init_27_arg_1 [L140] SORT_2 init_29_arg_1 = var_5; [L141] state_28 = init_29_arg_1 [L142] SORT_2 init_31_arg_1 = var_5; [L143] state_30 = init_31_arg_1 [L144] SORT_2 init_33_arg_1 = var_5; [L145] state_32 = init_33_arg_1 [L146] SORT_2 init_35_arg_1 = var_5; [L147] state_34 = init_35_arg_1 [L148] SORT_2 init_37_arg_1 = var_5; [L149] state_36 = init_37_arg_1 [L150] SORT_1 init_40_arg_1 = var_38; [L151] state_39 = init_40_arg_1 [L152] SORT_1 init_42_arg_1 = var_38; [L153] state_41 = init_42_arg_1 [L154] SORT_1 init_44_arg_1 = var_38; [L155] state_43 = init_44_arg_1 [L156] SORT_1 init_46_arg_1 = var_38; [L157] state_45 = init_46_arg_1 [L158] SORT_1 init_48_arg_1 = var_38; [L159] state_47 = init_48_arg_1 [L160] SORT_1 init_50_arg_1 = var_38; [L161] state_49 = init_50_arg_1 [L162] SORT_1 init_52_arg_1 = var_38; [L163] state_51 = init_52_arg_1 [L164] SORT_1 init_54_arg_1 = var_38; [L165] state_53 = init_54_arg_1 [L166] SORT_1 init_56_arg_1 = var_38; [L167] state_55 = init_56_arg_1 [L168] SORT_1 init_58_arg_1 = var_38; [L169] state_57 = init_58_arg_1 [L170] SORT_1 init_60_arg_1 = var_38; [L171] state_59 = init_60_arg_1 [L172] SORT_1 init_62_arg_1 = var_38; [L173] state_61 = init_62_arg_1 [L174] SORT_1 init_64_arg_1 = var_38; [L175] state_63 = init_64_arg_1 [L176] SORT_1 init_66_arg_1 = var_38; [L177] state_65 = init_66_arg_1 [L178] SORT_1 init_68_arg_1 = var_38; [L179] state_67 = init_68_arg_1 [L180] SORT_1 init_70_arg_1 = var_38; [L181] state_69 = init_70_arg_1 [L182] SORT_1 init_72_arg_1 = var_38; [L183] state_71 = init_72_arg_1 [L184] SORT_1 init_74_arg_1 = var_38; [L185] state_73 = init_74_arg_1 [L186] SORT_1 init_76_arg_1 = var_38; [L187] state_75 = init_76_arg_1 [L188] SORT_1 init_78_arg_1 = var_38; [L189] state_77 = init_78_arg_1 [L190] SORT_1 init_80_arg_1 = var_38; [L191] state_79 = init_80_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_30=0, state_32=0, state_34=0, state_36=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, var_115=0, var_120=3, var_126=2, var_132=1, var_156=2, var_170=3, var_313=4, var_338=4, var_38=0, var_5=0, var_81=1, var_82=0, var_94=0] [L194] input_93 = __VERIFIER_nondet_uchar() [L195] input_93 = input_93 & mask_SORT_1 [L196] input_95 = __VERIFIER_nondet_uchar() [L197] input_95 = input_95 & mask_SORT_1 [L198] input_99 = __VERIFIER_nondet_uchar() [L199] input_99 = input_99 & mask_SORT_1 [L200] input_100 = __VERIFIER_nondet_uchar() [L201] input_100 = input_100 & mask_SORT_1 [L202] input_104 = __VERIFIER_nondet_uchar() [L203] input_104 = input_104 & mask_SORT_1 [L204] input_105 = __VERIFIER_nondet_uchar() [L205] input_105 = input_105 & mask_SORT_1 [L206] input_109 = __VERIFIER_nondet_uchar() [L207] input_109 = input_109 & mask_SORT_1 [L208] input_110 = __VERIFIER_nondet_uchar() [L209] input_110 = input_110 & mask_SORT_1 [L210] input_114 = __VERIFIER_nondet_uchar() [L211] input_114 = input_114 & mask_SORT_1 [L212] input_121 = __VERIFIER_nondet_uchar() [L213] input_121 = input_121 & mask_SORT_1 [L214] input_127 = __VERIFIER_nondet_uchar() [L215] input_127 = input_127 & mask_SORT_1 [L216] input_133 = __VERIFIER_nondet_uchar() [L217] input_133 = input_133 & mask_SORT_1 [L218] input_184 = __VERIFIER_nondet_uchar() [L219] input_184 = input_184 & mask_SORT_1 [L220] input_187 = __VERIFIER_nondet_uchar() [L221] input_187 = input_187 & mask_SORT_1 [L222] input_191 = __VERIFIER_nondet_uchar() [L223] input_191 = input_191 & mask_SORT_1 [L224] input_198 = __VERIFIER_nondet_uchar() [L225] input_198 = input_198 & mask_SORT_1 [L226] input_201 = __VERIFIER_nondet_uchar() [L227] input_201 = input_201 & mask_SORT_1 [L228] input_205 = __VERIFIER_nondet_uchar() [L229] input_205 = input_205 & mask_SORT_1 [L230] input_212 = __VERIFIER_nondet_uchar() [L231] input_212 = input_212 & mask_SORT_1 [L232] input_215 = __VERIFIER_nondet_uchar() [L233] input_215 = input_215 & mask_SORT_1 [L234] input_219 = __VERIFIER_nondet_uchar() [L235] input_219 = input_219 & mask_SORT_1 [L236] input_226 = __VERIFIER_nondet_uchar() [L237] input_226 = input_226 & mask_SORT_1 [L238] input_229 = __VERIFIER_nondet_uchar() [L239] input_229 = input_229 & mask_SORT_1 [L240] input_233 = __VERIFIER_nondet_uchar() [L241] input_233 = input_233 & mask_SORT_1 [L242] input_243 = __VERIFIER_nondet_uchar() [L243] input_261 = __VERIFIER_nondet_uchar() [L244] input_279 = __VERIFIER_nondet_uchar() [L245] input_297 = __VERIFIER_nondet_uchar() [L248] SORT_1 var_83_arg_0 = state_41; [L249] SORT_4 var_83_arg_1 = var_81; [L250] SORT_4 var_83_arg_2 = var_82; [L251] EXPR var_83_arg_0 ? var_83_arg_1 : var_83_arg_2 [L251] SORT_4 var_83 = var_83_arg_0 ? var_83_arg_1 : var_83_arg_2; [L252] SORT_1 var_84_arg_0 = state_51; [L253] SORT_4 var_84_arg_1 = var_81; [L254] SORT_4 var_84_arg_2 = var_82; [L255] EXPR var_84_arg_0 ? var_84_arg_1 : var_84_arg_2 [L255] SORT_4 var_84 = var_84_arg_0 ? var_84_arg_1 : var_84_arg_2; [L256] SORT_4 var_85_arg_0 = var_83; [L257] SORT_4 var_85_arg_1 = var_84; [L258] SORT_4 var_85 = var_85_arg_0 + var_85_arg_1; [L259] SORT_1 var_86_arg_0 = state_61; [L260] SORT_4 var_86_arg_1 = var_81; [L261] SORT_4 var_86_arg_2 = var_82; [L262] EXPR var_86_arg_0 ? var_86_arg_1 : var_86_arg_2 [L262] SORT_4 var_86 = var_86_arg_0 ? var_86_arg_1 : var_86_arg_2; [L263] SORT_4 var_87_arg_0 = var_85; [L264] SORT_4 var_87_arg_1 = var_86; [L265] SORT_4 var_87 = var_87_arg_0 + var_87_arg_1; [L266] SORT_1 var_88_arg_0 = state_71; [L267] SORT_4 var_88_arg_1 = var_81; [L268] SORT_4 var_88_arg_2 = var_82; [L269] EXPR var_88_arg_0 ? var_88_arg_1 : var_88_arg_2 [L269] SORT_4 var_88 = var_88_arg_0 ? var_88_arg_1 : var_88_arg_2; [L270] SORT_4 var_89_arg_0 = var_87; [L271] SORT_4 var_89_arg_1 = var_88; [L272] SORT_4 var_89 = var_89_arg_0 + var_89_arg_1; [L273] var_89 = var_89 & mask_SORT_4 [L274] SORT_4 var_90_arg_0 = var_89; [L275] SORT_4 var_90_arg_1 = var_81; [L276] SORT_1 var_90 = var_90_arg_0 <= var_90_arg_1; [L277] SORT_1 var_91_arg_0 = ~state_79; [L278] var_91_arg_0 = var_91_arg_0 & mask_SORT_1 [L279] SORT_1 var_91_arg_1 = ~var_90; [L280] var_91_arg_1 = var_91_arg_1 & mask_SORT_1 [L281] SORT_1 var_91 = var_91_arg_0 & var_91_arg_1; [L282] var_91 = var_91 & mask_SORT_1 [L283] SORT_1 bad_92_arg_0 = var_91; [L284] CALL __VERIFIER_assert(!(bad_92_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:32:36,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 544bc30a09daedadbc71b7b1e61d9c7323ad28b5465f4ffee45b30f96e266ba6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:32:39,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:32:39,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:32:39,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:32:39,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:32:39,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:32:39,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:32:39,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:32:39,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:32:39,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:32:39,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:32:39,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:32:39,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:32:39,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:32:39,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:32:39,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:32:39,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:32:39,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:32:39,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:32:39,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:32:39,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:32:39,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:32:39,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:32:39,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:32:39,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:32:39,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:32:39,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:32:39,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:32:39,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:32:39,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:32:39,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:32:39,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:32:39,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:32:39,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:32:39,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:32:39,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:32:39,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:32:39,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:32:39,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:32:39,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:32:39,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:32:39,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:32:39,791 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:32:39,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:32:39,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:32:39,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:32:39,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:32:39,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:32:39,795 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:32:39,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:32:39,795 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:32:39,796 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:32:39,796 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:32:39,796 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:32:39,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:32:39,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:32:39,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:32:39,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:32:39,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:32:39,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:32:39,799 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:32:39,800 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:32:39,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:32:39,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:32:39,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:32:39,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:32:39,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:32:39,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:32:39,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:39,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:32:39,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:32:39,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:32:39,803 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:32:39,803 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:39,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:32:39,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:32:39,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:32:39,804 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544bc30a09daedadbc71b7b1e61d9c7323ad28b5465f4ffee45b30f96e266ba6 [2022-11-03 03:32:40,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:32:40,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:32:40,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:32:40,239 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:32:40,240 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:32:40,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c [2022-11-03 03:32:40,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/cf0be4d99/8c4a67186bfe434b88696f40886fe73a/FLAG94ccfabf3 [2022-11-03 03:32:41,097 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:32:41,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c [2022-11-03 03:32:41,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/cf0be4d99/8c4a67186bfe434b88696f40886fe73a/FLAG94ccfabf3 [2022-11-03 03:32:41,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/data/cf0be4d99/8c4a67186bfe434b88696f40886fe73a [2022-11-03 03:32:41,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:32:41,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:32:41,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:41,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:32:41,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:32:41,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:41" (1/1) ... [2022-11-03 03:32:41,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea7a36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:41, skipping insertion in model container [2022-11-03 03:32:41,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:41" (1/1) ... [2022-11-03 03:32:41,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:32:41,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:32:41,545 WARN L230 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_1304c479-27ad-4281-9862-56ef03952848/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c[1014,1027] [2022-11-03 03:32:42,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:42,029 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:32:42,041 WARN L230 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_1304c479-27ad-4281-9862-56ef03952848/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.5.prop1-func-interl.c[1014,1027] [2022-11-03 03:32:42,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:42,220 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:32:42,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42 WrapperNode [2022-11-03 03:32:42,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:42,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:42,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:32:42,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:32:42,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,453 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2325 [2022-11-03 03:32:42,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:42,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:32:42,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:32:42,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:32:42,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,610 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:32:42,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:32:42,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:32:42,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:32:42,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (1/1) ... [2022-11-03 03:32:42,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:42,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:32:42,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:32:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:32:42,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:32:43,446 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:32:43,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:32:45,483 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:32:45,501 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:32:45,502 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:32:45,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:45 BoogieIcfgContainer [2022-11-03 03:32:45,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:32:45,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:32:45,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:32:45,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:32:45,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:32:41" (1/3) ... [2022-11-03 03:32:45,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c629450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:45, skipping insertion in model container [2022-11-03 03:32:45,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:42" (2/3) ... [2022-11-03 03:32:45,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c629450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:45, skipping insertion in model container [2022-11-03 03:32:45,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:45" (3/3) ... [2022-11-03 03:32:45,518 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.peterson.5.prop1-func-interl.c [2022-11-03 03:32:45,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:32:45,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:32:45,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:32:45,655 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=FINITE_AUTOMATA, 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;@6242222e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:32:45,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:32:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.4965517241379311) internal successors, (217), 146 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:32:45,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:45,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:45,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1165686489, now seen corresponding path program 1 times [2022-11-03 03:32:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:45,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934733507] [2022-11-03 03:32:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:45,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:45,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:45,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:32:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:46,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:46,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934733507] [2022-11-03 03:32:46,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934733507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:46,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:46,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928909701] [2022-11-03 03:32:46,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:46,438 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.4965517241379311) internal successors, (217), 146 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:46,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:46,797 INFO L93 Difference]: Finished difference Result 569 states and 851 transitions. [2022-11-03 03:32:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:32:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:46,818 INFO L225 Difference]: With dead ends: 569 [2022-11-03 03:32:46,821 INFO L226 Difference]: Without dead ends: 424 [2022-11-03 03:32:46,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:46,831 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 619 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:46,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 823 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:32:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-03 03:32:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 145. [2022-11-03 03:32:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 213 transitions. [2022-11-03 03:32:46,912 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 213 transitions. Word has length 13 [2022-11-03 03:32:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:46,912 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 213 transitions. [2022-11-03 03:32:46,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 213 transitions. [2022-11-03 03:32:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:32:46,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:46,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:46,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:47,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:47,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:47,130 INFO L85 PathProgramCache]: Analyzing trace with hash 772659479, now seen corresponding path program 1 times [2022-11-03 03:32:47,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:47,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923724562] [2022-11-03 03:32:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:47,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:47,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:47,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:47,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:32:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:47,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:47,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:47,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923724562] [2022-11-03 03:32:47,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923724562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:47,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:47,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065416055] [2022-11-03 03:32:47,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:47,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:47,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:47,683 INFO L87 Difference]: Start difference. First operand 145 states and 213 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:47,921 INFO L93 Difference]: Finished difference Result 565 states and 835 transitions. [2022-11-03 03:32:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:32:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:47,925 INFO L225 Difference]: With dead ends: 565 [2022-11-03 03:32:47,926 INFO L226 Difference]: Without dead ends: 424 [2022-11-03 03:32:47,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:47,928 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 613 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:47,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 822 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:32:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-03 03:32:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 147. [2022-11-03 03:32:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4726027397260273) internal successors, (215), 146 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 215 transitions. [2022-11-03 03:32:47,951 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 215 transitions. Word has length 13 [2022-11-03 03:32:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:47,951 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 215 transitions. [2022-11-03 03:32:47,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 215 transitions. [2022-11-03 03:32:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:32:47,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:47,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:47,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:48,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:48,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:48,177 INFO L85 PathProgramCache]: Analyzing trace with hash -36687147, now seen corresponding path program 1 times [2022-11-03 03:32:48,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:48,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873881356] [2022-11-03 03:32:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:48,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:48,186 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:48,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:32:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:48,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:48,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:48,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:48,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873881356] [2022-11-03 03:32:48,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873881356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:48,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:48,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:48,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028675117] [2022-11-03 03:32:48,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:48,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:48,773 INFO L87 Difference]: Start difference. First operand 147 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:48,990 INFO L93 Difference]: Finished difference Result 565 states and 834 transitions. [2022-11-03 03:32:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:32:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:48,993 INFO L225 Difference]: With dead ends: 565 [2022-11-03 03:32:48,994 INFO L226 Difference]: Without dead ends: 424 [2022-11-03 03:32:48,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:48,996 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 607 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:48,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 821 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:32:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-03 03:32:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 149. [2022-11-03 03:32:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.4662162162162162) internal successors, (217), 148 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-11-03 03:32:49,007 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 13 [2022-11-03 03:32:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:49,008 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-11-03 03:32:49,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-11-03 03:32:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:32:49,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:49,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:49,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:49,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:49,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash 20571155, now seen corresponding path program 1 times [2022-11-03 03:32:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949808207] [2022-11-03 03:32:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:49,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:49,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:49,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:49,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:32:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:49,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:49,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:49,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949808207] [2022-11-03 03:32:49,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949808207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:49,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:49,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647427015] [2022-11-03 03:32:49,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:49,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:49,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:49,747 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:49,928 INFO L93 Difference]: Finished difference Result 565 states and 833 transitions. [2022-11-03 03:32:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:49,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:32:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:49,933 INFO L225 Difference]: With dead ends: 565 [2022-11-03 03:32:49,933 INFO L226 Difference]: Without dead ends: 424 [2022-11-03 03:32:49,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:49,935 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 601 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:49,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 823 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:32:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-03 03:32:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 151. [2022-11-03 03:32:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.46) internal successors, (219), 150 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 219 transitions. [2022-11-03 03:32:49,944 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 219 transitions. Word has length 13 [2022-11-03 03:32:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:49,945 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 219 transitions. [2022-11-03 03:32:49,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 219 transitions. [2022-11-03 03:32:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:32:49,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:49,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:49,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:50,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:50,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash 20630737, now seen corresponding path program 1 times [2022-11-03 03:32:50,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:50,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407545029] [2022-11-03 03:32:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:50,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:50,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:50,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:50,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:32:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:32:50,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:51,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:51,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:51,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407545029] [2022-11-03 03:32:51,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407545029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:51,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:51,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 03:32:51,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132425546] [2022-11-03 03:32:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:51,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:32:51,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:51,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:32:51,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:32:51,108 INFO L87 Difference]: Start difference. First operand 151 states and 219 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:54,039 INFO L93 Difference]: Finished difference Result 749 states and 1099 transitions. [2022-11-03 03:32:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 03:32:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:32:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:54,043 INFO L225 Difference]: With dead ends: 749 [2022-11-03 03:32:54,043 INFO L226 Difference]: Without dead ends: 747 [2022-11-03 03:32:54,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:32:54,045 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2251 mSDsluCounter, 2684 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:54,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2251 Valid, 2890 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 03:32:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-11-03 03:32:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 159. [2022-11-03 03:32:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.4556962025316456) internal successors, (230), 158 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 230 transitions. [2022-11-03 03:32:54,056 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 230 transitions. Word has length 13 [2022-11-03 03:32:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:54,057 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 230 transitions. [2022-11-03 03:32:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 230 transitions. [2022-11-03 03:32:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:32:54,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:54,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:54,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:54,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:54,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash 154654075, now seen corresponding path program 1 times [2022-11-03 03:32:54,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:54,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228265103] [2022-11-03 03:32:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:54,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:54,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:54,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:54,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:32:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:32:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:55,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:55,966 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:55,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228265103] [2022-11-03 03:32:55,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228265103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:55,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:55,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514270265] [2022-11-03 03:32:55,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:55,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:55,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:55,969 INFO L87 Difference]: Start difference. First operand 159 states and 230 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:56,557 INFO L93 Difference]: Finished difference Result 587 states and 863 transitions. [2022-11-03 03:32:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:32:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:56,561 INFO L225 Difference]: With dead ends: 587 [2022-11-03 03:32:56,561 INFO L226 Difference]: Without dead ends: 438 [2022-11-03 03:32:56,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:56,562 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 547 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:56,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 748 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:32:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-03 03:32:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 179. [2022-11-03 03:32:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.449438202247191) internal successors, (258), 178 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 258 transitions. [2022-11-03 03:32:56,573 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 258 transitions. Word has length 152 [2022-11-03 03:32:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:56,573 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 258 transitions. [2022-11-03 03:32:56,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 258 transitions. [2022-11-03 03:32:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:32:56,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:56,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:56,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:56,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:56,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1016487677, now seen corresponding path program 1 times [2022-11-03 03:32:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:56,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117362268] [2022-11-03 03:32:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:56,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:56,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:56,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:32:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:57,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:32:57,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:58,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:58,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117362268] [2022-11-03 03:32:58,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117362268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:58,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:58,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:32:58,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767036389] [2022-11-03 03:32:58,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:58,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:58,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:58,471 INFO L87 Difference]: Start difference. First operand 179 states and 258 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:59,108 INFO L93 Difference]: Finished difference Result 624 states and 914 transitions. [2022-11-03 03:32:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:32:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:59,112 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:32:59,113 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:32:59,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:32:59,114 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 788 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:59,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 1150 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:32:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:32:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 181. [2022-11-03 03:32:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4444444444444444) internal successors, (260), 180 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 260 transitions. [2022-11-03 03:32:59,124 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 260 transitions. Word has length 152 [2022-11-03 03:32:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:59,125 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 260 transitions. [2022-11-03 03:32:59,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 260 transitions. [2022-11-03 03:32:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:32:59,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:59,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:59,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:59,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:59,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1504534783, now seen corresponding path program 1 times [2022-11-03 03:32:59,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494639967] [2022-11-03 03:32:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:59,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:59,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:59,345 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:59,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:33:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:00,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:33:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:00,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:00,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:00,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494639967] [2022-11-03 03:33:00,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494639967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:00,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:00,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:00,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916255098] [2022-11-03 03:33:00,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:00,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:00,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:00,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:00,977 INFO L87 Difference]: Start difference. First operand 181 states and 260 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:01,605 INFO L93 Difference]: Finished difference Result 624 states and 913 transitions. [2022-11-03 03:33:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:01,609 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:33:01,609 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:33:01,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:01,611 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 781 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:01,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 1146 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:33:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:33:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 183. [2022-11-03 03:33:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.4395604395604396) internal successors, (262), 182 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 262 transitions. [2022-11-03 03:33:01,620 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 262 transitions. Word has length 152 [2022-11-03 03:33:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:01,621 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 262 transitions. [2022-11-03 03:33:01,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 262 transitions. [2022-11-03 03:33:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:01,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:01,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:01,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-03 03:33:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:01,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 222362497, now seen corresponding path program 1 times [2022-11-03 03:33:01,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:01,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77691755] [2022-11-03 03:33:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:01,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:01,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:33:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:33:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:03,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:03,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:03,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77691755] [2022-11-03 03:33:03,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77691755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:03,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:03,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:03,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609133359] [2022-11-03 03:33:03,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:03,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:03,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:03,504 INFO L87 Difference]: Start difference. First operand 183 states and 262 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:04,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:04,144 INFO L93 Difference]: Finished difference Result 624 states and 912 transitions. [2022-11-03 03:33:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:04,148 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:33:04,148 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:33:04,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:04,149 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 774 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:04,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1142 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:33:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 185. [2022-11-03 03:33:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.434782608695652) internal successors, (264), 184 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 264 transitions. [2022-11-03 03:33:04,158 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 264 transitions. Word has length 152 [2022-11-03 03:33:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:04,159 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 264 transitions. [2022-11-03 03:33:04,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 264 transitions. [2022-11-03 03:33:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:04,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:04,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:04,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:04,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:04,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1499640189, now seen corresponding path program 1 times [2022-11-03 03:33:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:04,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839572210] [2022-11-03 03:33:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:04,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:04,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:04,382 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:04,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:33:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:05,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:33:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:05,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:05,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839572210] [2022-11-03 03:33:05,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839572210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:05,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:05,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:05,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161082647] [2022-11-03 03:33:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:05,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:05,967 INFO L87 Difference]: Start difference. First operand 185 states and 264 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:06,753 INFO L93 Difference]: Finished difference Result 624 states and 911 transitions. [2022-11-03 03:33:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:06,756 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:33:06,757 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:33:06,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:06,758 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 766 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:06,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 1091 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:33:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:33:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 187. [2022-11-03 03:33:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.4301075268817205) internal successors, (266), 186 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2022-11-03 03:33:06,774 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 152 [2022-11-03 03:33:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:06,775 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2022-11-03 03:33:06,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2022-11-03 03:33:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:06,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:06,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:06,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:06,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:06,988 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash 429292037, now seen corresponding path program 1 times [2022-11-03 03:33:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:06,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452819356] [2022-11-03 03:33:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:06,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:06,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:06,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:06,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:33:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:07,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:33:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:08,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:08,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:08,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452819356] [2022-11-03 03:33:08,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452819356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:08,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:08,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:08,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823996157] [2022-11-03 03:33:08,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:08,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:08,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:08,602 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:09,499 INFO L93 Difference]: Finished difference Result 632 states and 922 transitions. [2022-11-03 03:33:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:09,502 INFO L225 Difference]: With dead ends: 632 [2022-11-03 03:33:09,502 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 03:33:09,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:09,504 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 971 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:09,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 1483 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:33:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 03:33:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 191. [2022-11-03 03:33:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4263157894736842) internal successors, (271), 190 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 271 transitions. [2022-11-03 03:33:09,513 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 271 transitions. Word has length 152 [2022-11-03 03:33:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:09,514 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 271 transitions. [2022-11-03 03:33:09,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 271 transitions. [2022-11-03 03:33:09,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:09,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:09,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:09,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:09,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:09,732 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1218070905, now seen corresponding path program 1 times [2022-11-03 03:33:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342835867] [2022-11-03 03:33:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:09,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:09,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:09,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:09,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:33:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:33:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:11,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:11,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:11,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342835867] [2022-11-03 03:33:11,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342835867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:11,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:11,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:11,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62088960] [2022-11-03 03:33:11,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:11,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:11,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:11,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:11,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:11,268 INFO L87 Difference]: Start difference. First operand 191 states and 271 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:12,115 INFO L93 Difference]: Finished difference Result 632 states and 921 transitions. [2022-11-03 03:33:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:12,118 INFO L225 Difference]: With dead ends: 632 [2022-11-03 03:33:12,119 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 03:33:12,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:12,120 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 963 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:12,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 1476 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:33:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 03:33:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 193. [2022-11-03 03:33:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.421875) internal successors, (273), 192 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 273 transitions. [2022-11-03 03:33:12,138 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 273 transitions. Word has length 152 [2022-11-03 03:33:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:12,139 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 273 transitions. [2022-11-03 03:33:12,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 273 transitions. [2022-11-03 03:33:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:12,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:12,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:12,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:12,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:12,365 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2038311817, now seen corresponding path program 1 times [2022-11-03 03:33:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:12,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108955961] [2022-11-03 03:33:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:12,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:12,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:12,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:33:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:13,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:33:13,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:14,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:14,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:14,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108955961] [2022-11-03 03:33:14,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108955961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:14,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:14,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118436817] [2022-11-03 03:33:14,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:14,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:14,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:14,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:14,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:14,065 INFO L87 Difference]: Start difference. First operand 193 states and 273 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:14,807 INFO L93 Difference]: Finished difference Result 624 states and 908 transitions. [2022-11-03 03:33:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:14,810 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:33:14,810 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:33:14,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:14,811 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 740 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:14,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 1099 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:33:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 195. [2022-11-03 03:33:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.4175257731958764) internal successors, (275), 194 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 275 transitions. [2022-11-03 03:33:14,821 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 275 transitions. Word has length 152 [2022-11-03 03:33:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:14,821 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 275 transitions. [2022-11-03 03:33:14,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 275 transitions. [2022-11-03 03:33:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:14,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:14,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:14,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:15,024 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -103548661, now seen corresponding path program 1 times [2022-11-03 03:33:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:15,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408958502] [2022-11-03 03:33:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:15,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:15,028 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:15,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:33:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:33:16,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:16,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:16,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408958502] [2022-11-03 03:33:16,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408958502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:16,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:16,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042806230] [2022-11-03 03:33:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:16,784 INFO L87 Difference]: Start difference. First operand 195 states and 275 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:17,556 INFO L93 Difference]: Finished difference Result 640 states and 931 transitions. [2022-11-03 03:33:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:17,560 INFO L225 Difference]: With dead ends: 640 [2022-11-03 03:33:17,560 INFO L226 Difference]: Without dead ends: 491 [2022-11-03 03:33:17,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:17,561 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 962 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:17,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1496 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-03 03:33:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 197. [2022-11-03 03:33:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.413265306122449) internal successors, (277), 196 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 277 transitions. [2022-11-03 03:33:17,572 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 277 transitions. Word has length 152 [2022-11-03 03:33:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:17,572 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 277 transitions. [2022-11-03 03:33:17,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 277 transitions. [2022-11-03 03:33:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:17,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:17,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:17,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:17,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:17,797 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:17,797 INFO L85 PathProgramCache]: Analyzing trace with hash 14892813, now seen corresponding path program 1 times [2022-11-03 03:33:17,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048204557] [2022-11-03 03:33:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:17,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:17,800 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:17,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:33:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:33:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:19,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:19,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048204557] [2022-11-03 03:33:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048204557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:19,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:19,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:19,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521897064] [2022-11-03 03:33:19,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:19,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:19,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:19,367 INFO L87 Difference]: Start difference. First operand 197 states and 277 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:20,073 INFO L93 Difference]: Finished difference Result 640 states and 930 transitions. [2022-11-03 03:33:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:20,075 INFO L225 Difference]: With dead ends: 640 [2022-11-03 03:33:20,075 INFO L226 Difference]: Without dead ends: 491 [2022-11-03 03:33:20,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:20,076 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 954 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:20,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 1489 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-03 03:33:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 199. [2022-11-03 03:33:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4090909090909092) internal successors, (279), 198 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 279 transitions. [2022-11-03 03:33:20,096 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 279 transitions. Word has length 152 [2022-11-03 03:33:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:20,096 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 279 transitions. [2022-11-03 03:33:20,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 279 transitions. [2022-11-03 03:33:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:20,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:20,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:20,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:20,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:20,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2018501233, now seen corresponding path program 1 times [2022-11-03 03:33:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466757759] [2022-11-03 03:33:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:20,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:20,326 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:20,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:33:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:21,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:33:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:21,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:21,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466757759] [2022-11-03 03:33:21,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466757759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:21,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:21,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339713946] [2022-11-03 03:33:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:21,788 INFO L87 Difference]: Start difference. First operand 199 states and 279 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:22,497 INFO L93 Difference]: Finished difference Result 640 states and 929 transitions. [2022-11-03 03:33:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:22,499 INFO L225 Difference]: With dead ends: 640 [2022-11-03 03:33:22,499 INFO L226 Difference]: Without dead ends: 491 [2022-11-03 03:33:22,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:22,500 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 946 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:22,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 1482 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-03 03:33:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 201. [2022-11-03 03:33:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.405) internal successors, (281), 200 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 281 transitions. [2022-11-03 03:33:22,511 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 281 transitions. Word has length 152 [2022-11-03 03:33:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:22,511 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 281 transitions. [2022-11-03 03:33:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 281 transitions. [2022-11-03 03:33:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:22,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:22,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:22,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:22,729 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 969323665, now seen corresponding path program 1 times [2022-11-03 03:33:22,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622499026] [2022-11-03 03:33:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:22,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:22,733 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:22,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:33:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:23,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:33:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:24,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:24,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:24,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622499026] [2022-11-03 03:33:24,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622499026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:24,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:24,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642578660] [2022-11-03 03:33:24,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:24,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:24,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:24,435 INFO L87 Difference]: Start difference. First operand 201 states and 281 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:25,179 INFO L93 Difference]: Finished difference Result 648 states and 940 transitions. [2022-11-03 03:33:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:25,182 INFO L225 Difference]: With dead ends: 648 [2022-11-03 03:33:25,182 INFO L226 Difference]: Without dead ends: 499 [2022-11-03 03:33:25,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:25,183 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 949 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:25,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 1481 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-03 03:33:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 205. [2022-11-03 03:33:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4019607843137254) internal successors, (286), 204 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 286 transitions. [2022-11-03 03:33:25,194 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 286 transitions. Word has length 152 [2022-11-03 03:33:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:25,194 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 286 transitions. [2022-11-03 03:33:25,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 286 transitions. [2022-11-03 03:33:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:25,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:25,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:25,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:25,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:25,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1724572525, now seen corresponding path program 1 times [2022-11-03 03:33:25,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:25,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871049878] [2022-11-03 03:33:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:25,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:25,416 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:25,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:33:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:33:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:26,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:26,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:26,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871049878] [2022-11-03 03:33:26,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871049878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:26,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:26,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156333364] [2022-11-03 03:33:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:26,917 INFO L87 Difference]: Start difference. First operand 205 states and 286 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:27,614 INFO L93 Difference]: Finished difference Result 648 states and 939 transitions. [2022-11-03 03:33:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:27,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:27,616 INFO L225 Difference]: With dead ends: 648 [2022-11-03 03:33:27,617 INFO L226 Difference]: Without dead ends: 499 [2022-11-03 03:33:27,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:27,618 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 941 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:27,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 1474 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:27,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-03 03:33:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 207. [2022-11-03 03:33:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3980582524271845) internal successors, (288), 206 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 288 transitions. [2022-11-03 03:33:27,628 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 288 transitions. Word has length 152 [2022-11-03 03:33:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:27,628 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 288 transitions. [2022-11-03 03:33:27,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 288 transitions. [2022-11-03 03:33:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:27,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:27,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:27,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-03 03:33:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:27,841 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash -373187307, now seen corresponding path program 1 times [2022-11-03 03:33:27,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928271217] [2022-11-03 03:33:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:27,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:27,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:27,845 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:27,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:33:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:28,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:33:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:29,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:29,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:29,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928271217] [2022-11-03 03:33:29,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928271217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:29,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:29,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345910667] [2022-11-03 03:33:29,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:29,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:29,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:29,433 INFO L87 Difference]: Start difference. First operand 207 states and 288 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:30,130 INFO L93 Difference]: Finished difference Result 648 states and 938 transitions. [2022-11-03 03:33:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:30,132 INFO L225 Difference]: With dead ends: 648 [2022-11-03 03:33:30,132 INFO L226 Difference]: Without dead ends: 499 [2022-11-03 03:33:30,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:30,133 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 933 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:30,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 1467 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:33:30,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-03 03:33:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 209. [2022-11-03 03:33:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.3942307692307692) internal successors, (290), 208 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 290 transitions. [2022-11-03 03:33:30,143 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 290 transitions. Word has length 152 [2022-11-03 03:33:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:30,143 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 290 transitions. [2022-11-03 03:33:30,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 290 transitions. [2022-11-03 03:33:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:30,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:30,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:30,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:30,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:30,361 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1256696297, now seen corresponding path program 1 times [2022-11-03 03:33:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:30,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248639672] [2022-11-03 03:33:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:30,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:30,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:30,364 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:30,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:33:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:33:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:31,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:31,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:31,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248639672] [2022-11-03 03:33:31,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248639672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:31,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:31,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:33:31,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118822575] [2022-11-03 03:33:31,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:31,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:33:31,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:31,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:33:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:31,622 INFO L87 Difference]: Start difference. First operand 209 states and 290 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:31,842 INFO L93 Difference]: Finished difference Result 587 states and 849 transitions. [2022-11-03 03:33:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:33:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:31,844 INFO L225 Difference]: With dead ends: 587 [2022-11-03 03:33:31,845 INFO L226 Difference]: Without dead ends: 438 [2022-11-03 03:33:31,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:31,846 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 374 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:31,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 786 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:33:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-03 03:33:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 243. [2022-11-03 03:33:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.4049586776859504) internal successors, (340), 242 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 340 transitions. [2022-11-03 03:33:31,857 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 340 transitions. Word has length 152 [2022-11-03 03:33:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:31,858 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 340 transitions. [2022-11-03 03:33:31,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 340 transitions. [2022-11-03 03:33:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:31,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:31,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:31,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:32,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:32,073 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash -695996519, now seen corresponding path program 1 times [2022-11-03 03:33:32,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:32,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988261070] [2022-11-03 03:33:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:32,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:32,078 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:32,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:33:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:33:32,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:33,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:33,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:33,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988261070] [2022-11-03 03:33:33,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988261070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:33,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:33,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486611112] [2022-11-03 03:33:33,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:33,363 INFO L87 Difference]: Start difference. First operand 243 states and 340 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:33,694 INFO L93 Difference]: Finished difference Result 688 states and 996 transitions. [2022-11-03 03:33:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:33,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:33,698 INFO L225 Difference]: With dead ends: 688 [2022-11-03 03:33:33,698 INFO L226 Difference]: Without dead ends: 539 [2022-11-03 03:33:33,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:33,700 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 712 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:33,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1173 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:33:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-03 03:33:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 245. [2022-11-03 03:33:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.401639344262295) internal successors, (342), 244 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 342 transitions. [2022-11-03 03:33:33,711 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 342 transitions. Word has length 152 [2022-11-03 03:33:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:33,711 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 342 transitions. [2022-11-03 03:33:33,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 342 transitions. [2022-11-03 03:33:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:33,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:33,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:33,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:33,937 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash 564920731, now seen corresponding path program 1 times [2022-11-03 03:33:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:33,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184299371] [2022-11-03 03:33:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:33,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:33,940 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:33,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:33:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:33:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:35,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:35,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:35,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184299371] [2022-11-03 03:33:35,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184299371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:35,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:35,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:35,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363604650] [2022-11-03 03:33:35,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:35,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:35,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:35,466 INFO L87 Difference]: Start difference. First operand 245 states and 342 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:35,973 INFO L93 Difference]: Finished difference Result 640 states and 923 transitions. [2022-11-03 03:33:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:35,979 INFO L225 Difference]: With dead ends: 640 [2022-11-03 03:33:35,979 INFO L226 Difference]: Without dead ends: 491 [2022-11-03 03:33:35,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:35,984 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 813 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:35,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 1369 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:33:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-03 03:33:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 249. [2022-11-03 03:33:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.3991935483870968) internal successors, (347), 248 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2022-11-03 03:33:36,012 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 152 [2022-11-03 03:33:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:36,013 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2022-11-03 03:33:36,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2022-11-03 03:33:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:36,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:36,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:36,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:36,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:36,241 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1008821405, now seen corresponding path program 1 times [2022-11-03 03:33:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:36,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922854171] [2022-11-03 03:33:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:36,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:36,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:36,244 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:36,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:33:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:33:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:37,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:37,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:37,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922854171] [2022-11-03 03:33:37,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922854171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:37,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:37,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:37,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507865479] [2022-11-03 03:33:37,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:37,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:37,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:37,513 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:37,996 INFO L93 Difference]: Finished difference Result 632 states and 910 transitions. [2022-11-03 03:33:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:38,000 INFO L225 Difference]: With dead ends: 632 [2022-11-03 03:33:38,000 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 03:33:38,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:38,002 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 788 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:38,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 1331 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:33:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 03:33:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 251. [2022-11-03 03:33:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.396) internal successors, (349), 250 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 349 transitions. [2022-11-03 03:33:38,015 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 349 transitions. Word has length 152 [2022-11-03 03:33:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:38,015 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 349 transitions. [2022-11-03 03:33:38,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 349 transitions. [2022-11-03 03:33:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:38,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:38,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:38,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:38,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:38,241 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:38,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1019764705, now seen corresponding path program 1 times [2022-11-03 03:33:38,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27367181] [2022-11-03 03:33:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:38,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:38,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:38,243 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:38,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:33:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:33:39,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:39,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:39,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:39,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27367181] [2022-11-03 03:33:39,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27367181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:39,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:39,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:33:39,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918762078] [2022-11-03 03:33:39,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:39,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:33:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:33:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:39,597 INFO L87 Difference]: Start difference. First operand 251 states and 349 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:39,871 INFO L93 Difference]: Finished difference Result 587 states and 845 transitions. [2022-11-03 03:33:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:33:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:39,874 INFO L225 Difference]: With dead ends: 587 [2022-11-03 03:33:39,874 INFO L226 Difference]: Without dead ends: 438 [2022-11-03 03:33:39,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:39,876 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 340 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:39,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 782 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:33:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-03 03:33:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 255. [2022-11-03 03:33:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.3937007874015748) internal successors, (354), 254 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 354 transitions. [2022-11-03 03:33:39,889 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 354 transitions. Word has length 152 [2022-11-03 03:33:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:39,890 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 354 transitions. [2022-11-03 03:33:39,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 354 transitions. [2022-11-03 03:33:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:39,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:39,892 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:39,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:40,117 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1372853087, now seen corresponding path program 1 times [2022-11-03 03:33:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:40,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536901604] [2022-11-03 03:33:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:40,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:40,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:40,120 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:40,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:33:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:40,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:33:40,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:41,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:41,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:41,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536901604] [2022-11-03 03:33:41,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536901604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:41,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:41,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418598099] [2022-11-03 03:33:41,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:41,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:41,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:41,403 INFO L87 Difference]: Start difference. First operand 255 states and 354 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:41,678 INFO L93 Difference]: Finished difference Result 700 states and 1010 transitions. [2022-11-03 03:33:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:41,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:41,682 INFO L225 Difference]: With dead ends: 700 [2022-11-03 03:33:41,683 INFO L226 Difference]: Without dead ends: 551 [2022-11-03 03:33:41,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:41,684 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 696 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:41,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1165 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:33:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-03 03:33:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 257. [2022-11-03 03:33:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.390625) internal successors, (356), 256 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 356 transitions. [2022-11-03 03:33:41,696 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 356 transitions. Word has length 152 [2022-11-03 03:33:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:41,697 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 356 transitions. [2022-11-03 03:33:41,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 356 transitions. [2022-11-03 03:33:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:41,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:41,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:41,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:41,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:41,913 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash -479366749, now seen corresponding path program 1 times [2022-11-03 03:33:41,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:41,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816426179] [2022-11-03 03:33:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:41,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:41,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:41,917 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:41,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:33:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:42,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:33:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:43,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:43,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:43,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816426179] [2022-11-03 03:33:43,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816426179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:43,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:43,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515324504] [2022-11-03 03:33:43,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:43,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:43,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:43,384 INFO L87 Difference]: Start difference. First operand 257 states and 356 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:43,877 INFO L93 Difference]: Finished difference Result 640 states and 919 transitions. [2022-11-03 03:33:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:43,881 INFO L225 Difference]: With dead ends: 640 [2022-11-03 03:33:43,881 INFO L226 Difference]: Without dead ends: 491 [2022-11-03 03:33:43,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:43,882 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 771 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:43,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 1329 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:33:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-03 03:33:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 261. [2022-11-03 03:33:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.3884615384615384) internal successors, (361), 260 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 361 transitions. [2022-11-03 03:33:43,894 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 361 transitions. Word has length 152 [2022-11-03 03:33:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:43,895 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 361 transitions. [2022-11-03 03:33:43,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 361 transitions. [2022-11-03 03:33:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:43,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:43,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:43,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:44,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:44,108 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash -55720027, now seen corresponding path program 1 times [2022-11-03 03:33:44,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:44,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632581690] [2022-11-03 03:33:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:44,113 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:44,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:33:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:45,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:33:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:45,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:45,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:45,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632581690] [2022-11-03 03:33:45,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632581690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:45,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:45,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:45,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918540618] [2022-11-03 03:33:45,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:45,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:45,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:45,519 INFO L87 Difference]: Start difference. First operand 261 states and 361 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:46,003 INFO L93 Difference]: Finished difference Result 632 states and 906 transitions. [2022-11-03 03:33:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:46,005 INFO L225 Difference]: With dead ends: 632 [2022-11-03 03:33:46,005 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 03:33:46,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:46,007 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 746 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:46,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1291 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:33:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 03:33:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 263. [2022-11-03 03:33:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3854961832061068) internal successors, (363), 262 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 363 transitions. [2022-11-03 03:33:46,018 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 363 transitions. Word has length 152 [2022-11-03 03:33:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:46,019 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 363 transitions. [2022-11-03 03:33:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 363 transitions. [2022-11-03 03:33:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:46,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:46,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:46,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:46,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:46,237 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1901087193, now seen corresponding path program 1 times [2022-11-03 03:33:46,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:46,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132682479] [2022-11-03 03:33:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:46,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:46,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:46,240 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:46,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:33:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:47,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:33:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:47,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:47,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:47,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132682479] [2022-11-03 03:33:47,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132682479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:47,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:47,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:47,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065983282] [2022-11-03 03:33:47,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:47,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:47,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:47,561 INFO L87 Difference]: Start difference. First operand 263 states and 363 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:47,941 INFO L93 Difference]: Finished difference Result 624 states and 893 transitions. [2022-11-03 03:33:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:47,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:47,944 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:33:47,944 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:33:47,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:47,944 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 538 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:47,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1019 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:33:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:33:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 265. [2022-11-03 03:33:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.3825757575757576) internal successors, (365), 264 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 365 transitions. [2022-11-03 03:33:47,956 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 365 transitions. Word has length 152 [2022-11-03 03:33:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:47,956 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 365 transitions. [2022-11-03 03:33:47,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 365 transitions. [2022-11-03 03:33:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:47,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:47,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:47,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:48,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:48,181 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1241555671, now seen corresponding path program 1 times [2022-11-03 03:33:48,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:48,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631352516] [2022-11-03 03:33:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:48,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:48,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:48,185 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:48,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:33:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:49,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:33:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:49,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:49,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:49,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631352516] [2022-11-03 03:33:49,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631352516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:49,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:49,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:49,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625648192] [2022-11-03 03:33:49,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:49,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:49,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:49,520 INFO L87 Difference]: Start difference. First operand 265 states and 365 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:49,807 INFO L93 Difference]: Finished difference Result 712 states and 1024 transitions. [2022-11-03 03:33:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:49,811 INFO L225 Difference]: With dead ends: 712 [2022-11-03 03:33:49,811 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:33:49,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:49,812 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 681 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:49,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1163 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:33:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:33:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 269. [2022-11-03 03:33:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.3805970149253732) internal successors, (370), 268 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 370 transitions. [2022-11-03 03:33:49,823 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 370 transitions. Word has length 152 [2022-11-03 03:33:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:49,823 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 370 transitions. [2022-11-03 03:33:49,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 370 transitions. [2022-11-03 03:33:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:49,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:49,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:49,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:50,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:50,048 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1313942229, now seen corresponding path program 1 times [2022-11-03 03:33:50,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:50,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998603396] [2022-11-03 03:33:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:50,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:50,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:50,051 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:50,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:33:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:33:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:51,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:51,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998603396] [2022-11-03 03:33:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998603396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:51,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047014668] [2022-11-03 03:33:51,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:51,527 INFO L87 Difference]: Start difference. First operand 269 states and 370 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:51,985 INFO L93 Difference]: Finished difference Result 640 states and 915 transitions. [2022-11-03 03:33:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:51,991 INFO L225 Difference]: With dead ends: 640 [2022-11-03 03:33:51,992 INFO L226 Difference]: Without dead ends: 491 [2022-11-03 03:33:51,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:51,993 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 729 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:51,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1289 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:33:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-03 03:33:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 273. [2022-11-03 03:33:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.3786764705882353) internal successors, (375), 272 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 375 transitions. [2022-11-03 03:33:52,005 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 375 transitions. Word has length 152 [2022-11-03 03:33:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:52,005 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 375 transitions. [2022-11-03 03:33:52,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 375 transitions. [2022-11-03 03:33:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:52,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:52,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:52,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:52,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:52,221 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash 72261165, now seen corresponding path program 1 times [2022-11-03 03:33:52,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:52,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198863688] [2022-11-03 03:33:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:52,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:52,224 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:52,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:33:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:33:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:53,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:53,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:53,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198863688] [2022-11-03 03:33:53,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198863688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:53,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:53,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:53,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156846850] [2022-11-03 03:33:53,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:53,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:53,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:53,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:53,576 INFO L87 Difference]: Start difference. First operand 273 states and 375 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:54,063 INFO L93 Difference]: Finished difference Result 632 states and 902 transitions. [2022-11-03 03:33:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:54,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:54,065 INFO L225 Difference]: With dead ends: 632 [2022-11-03 03:33:54,065 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 03:33:54,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:54,066 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 704 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:54,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 1251 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:33:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 03:33:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 275. [2022-11-03 03:33:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.3759124087591241) internal successors, (377), 274 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 377 transitions. [2022-11-03 03:33:54,078 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 377 transitions. Word has length 152 [2022-11-03 03:33:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:54,079 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 377 transitions. [2022-11-03 03:33:54,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 377 transitions. [2022-11-03 03:33:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:54,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:54,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:54,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:54,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:54,297 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1995489199, now seen corresponding path program 1 times [2022-11-03 03:33:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:54,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058809925] [2022-11-03 03:33:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:54,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:54,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:54,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:54,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:33:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:33:55,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:55,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:55,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:55,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058809925] [2022-11-03 03:33:55,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058809925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:55,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:55,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:55,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020627134] [2022-11-03 03:33:55,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:55,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:55,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:55,585 INFO L87 Difference]: Start difference. First operand 275 states and 377 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:55,935 INFO L93 Difference]: Finished difference Result 624 states and 889 transitions. [2022-11-03 03:33:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:55,937 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:33:55,937 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:33:55,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:55,938 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 500 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:55,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 997 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:33:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:33:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 277. [2022-11-03 03:33:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.3731884057971016) internal successors, (379), 276 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 379 transitions. [2022-11-03 03:33:55,952 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 379 transitions. Word has length 152 [2022-11-03 03:33:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:55,952 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 379 transitions. [2022-11-03 03:33:55,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 379 transitions. [2022-11-03 03:33:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:55,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:55,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:55,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:56,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:56,173 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2136037809, now seen corresponding path program 1 times [2022-11-03 03:33:56,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:56,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580476587] [2022-11-03 03:33:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:56,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:56,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:56,176 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:56,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:33:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:33:57,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:57,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:57,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:57,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580476587] [2022-11-03 03:33:57,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580476587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:57,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:57,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:33:57,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944884501] [2022-11-03 03:33:57,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:57,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:33:57,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:33:57,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:57,505 INFO L87 Difference]: Start difference. First operand 277 states and 379 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:57,733 INFO L93 Difference]: Finished difference Result 587 states and 836 transitions. [2022-11-03 03:33:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:33:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:57,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:57,736 INFO L225 Difference]: With dead ends: 587 [2022-11-03 03:33:57,736 INFO L226 Difference]: Without dead ends: 438 [2022-11-03 03:33:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:57,737 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 270 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:57,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 772 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:33:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-03 03:33:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 279. [2022-11-03 03:33:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.370503597122302) internal successors, (381), 278 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 381 transitions. [2022-11-03 03:33:57,746 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 381 transitions. Word has length 152 [2022-11-03 03:33:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:57,746 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 381 transitions. [2022-11-03 03:33:57,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 381 transitions. [2022-11-03 03:33:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:57,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:57,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:57,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:57,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:57,957 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash 330599475, now seen corresponding path program 1 times [2022-11-03 03:33:57,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:57,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643092155] [2022-11-03 03:33:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:57,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:57,960 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:57,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:33:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:33:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:59,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:59,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:59,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643092155] [2022-11-03 03:33:59,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643092155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:59,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:59,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:59,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811444209] [2022-11-03 03:33:59,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:59,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:59,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:59,324 INFO L87 Difference]: Start difference. First operand 279 states and 381 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:59,643 INFO L93 Difference]: Finished difference Result 724 states and 1037 transitions. [2022-11-03 03:33:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:33:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:59,645 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:33:59,645 INFO L226 Difference]: Without dead ends: 575 [2022-11-03 03:33:59,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:59,646 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 661 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:59,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 1156 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:33:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-03 03:33:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 281. [2022-11-03 03:33:59,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3678571428571429) internal successors, (383), 280 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 383 transitions. [2022-11-03 03:33:59,654 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 383 transitions. Word has length 152 [2022-11-03 03:33:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:59,654 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 383 transitions. [2022-11-03 03:33:59,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 383 transitions. [2022-11-03 03:33:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:33:59,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:59,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:59,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:59,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:59,863 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash 753301301, now seen corresponding path program 1 times [2022-11-03 03:33:59,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:59,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381016726] [2022-11-03 03:33:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:59,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:59,866 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:59,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:34:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:00,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:34:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:01,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:01,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381016726] [2022-11-03 03:34:01,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381016726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:01,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:01,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:34:01,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433199703] [2022-11-03 03:34:01,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:01,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:34:01,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:34:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:34:01,231 INFO L87 Difference]: Start difference. First operand 281 states and 383 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:01,744 INFO L93 Difference]: Finished difference Result 632 states and 898 transitions. [2022-11-03 03:34:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:34:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:34:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:01,749 INFO L225 Difference]: With dead ends: 632 [2022-11-03 03:34:01,749 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 03:34:01,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:34:01,749 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 659 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:01,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 1213 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:34:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 03:34:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 287. [2022-11-03 03:34:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.367132867132867) internal successors, (391), 286 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 391 transitions. [2022-11-03 03:34:01,759 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 391 transitions. Word has length 152 [2022-11-03 03:34:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:01,760 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 391 transitions. [2022-11-03 03:34:01,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 391 transitions. [2022-11-03 03:34:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:34:01,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:01,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:01,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:01,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:34:01,973 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash -526562377, now seen corresponding path program 1 times [2022-11-03 03:34:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:01,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411830771] [2022-11-03 03:34:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:01,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:01,976 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:01,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:34:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:02,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:34:02,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:03,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:03,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411830771] [2022-11-03 03:34:03,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411830771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:03,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:03,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:34:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083197692] [2022-11-03 03:34:03,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:03,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:34:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:34:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:34:03,333 INFO L87 Difference]: Start difference. First operand 287 states and 391 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:03,737 INFO L93 Difference]: Finished difference Result 624 states and 885 transitions. [2022-11-03 03:34:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:34:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:34:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:03,740 INFO L225 Difference]: With dead ends: 624 [2022-11-03 03:34:03,741 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 03:34:03,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:34:03,742 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 460 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:03,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 977 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:34:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 03:34:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 289. [2022-11-03 03:34:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.3645833333333333) internal successors, (393), 288 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 393 transitions. [2022-11-03 03:34:03,757 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 393 transitions. Word has length 152 [2022-11-03 03:34:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:03,757 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 393 transitions. [2022-11-03 03:34:03,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 393 transitions. [2022-11-03 03:34:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:34:03,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:03,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:03,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:03,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:34:03,987 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1113368391, now seen corresponding path program 1 times [2022-11-03 03:34:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434205679] [2022-11-03 03:34:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:03,991 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:03,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:34:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:06,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:07,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434205679] [2022-11-03 03:34:07,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434205679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [656843224] [2022-11-03 03:34:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:07,057 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:07,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:07,060 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:07,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 03:34:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:08,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:09,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:10,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [656843224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:10,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388030008] [2022-11-03 03:34:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:10,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:10,218 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:10,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 03:34:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:12,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:13,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388030008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:13,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:34:13,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 03:34:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821408190] [2022-11-03 03:34:13,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:13,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 03:34:13,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:13,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 03:34:13,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:34:13,242 INFO L87 Difference]: Start difference. First operand 289 states and 393 transitions. Second operand has 28 states, 28 states have (on average 20.75) internal successors, (581), 28 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:13,719 INFO L93 Difference]: Finished difference Result 565 states and 772 transitions. [2022-11-03 03:34:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:34:13,721 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 20.75) internal successors, (581), 28 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:34:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:13,723 INFO L225 Difference]: With dead ends: 565 [2022-11-03 03:34:13,723 INFO L226 Difference]: Without dead ends: 416 [2022-11-03 03:34:13,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 880 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:34:13,725 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 639 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 2491 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:13,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 2491 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-11-03 03:34:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-03 03:34:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-11-03 03:34:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.3277108433734939) internal successors, (551), 415 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 551 transitions. [2022-11-03 03:34:13,753 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 551 transitions. Word has length 152 [2022-11-03 03:34:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:13,754 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 551 transitions. [2022-11-03 03:34:13,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.75) internal successors, (581), 28 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 551 transitions. [2022-11-03 03:34:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:34:13,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:13,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:13,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:13,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:14,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:14,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:14,371 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1506395401, now seen corresponding path program 1 times [2022-11-03 03:34:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:14,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842847823] [2022-11-03 03:34:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:14,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:14,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:14,375 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:14,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:34:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:15,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:16,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:17,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842847823] [2022-11-03 03:34:17,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842847823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916994265] [2022-11-03 03:34:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:17,329 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:17,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 03:34:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:19,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:19,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:20,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916994265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587774251] [2022-11-03 03:34:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:20,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:20,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:20,329 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:20,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 03:34:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:21,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:22,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587774251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:22,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:34:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:34:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834114578] [2022-11-03 03:34:22,336 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:22,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:34:22,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:22,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:34:22,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:34:22,339 INFO L87 Difference]: Start difference. First operand 416 states and 551 transitions. Second operand has 16 states, 16 states have (on average 18.5625) internal successors, (297), 16 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:22,638 INFO L93 Difference]: Finished difference Result 717 states and 965 transitions. [2022-11-03 03:34:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:34:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.5625) internal successors, (297), 16 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:34:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:22,641 INFO L225 Difference]: With dead ends: 717 [2022-11-03 03:34:22,641 INFO L226 Difference]: Without dead ends: 568 [2022-11-03 03:34:22,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 888 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:34:22,642 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 289 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:22,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 2024 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-11-03 03:34:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-03 03:34:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 543. [2022-11-03 03:34:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.3062730627306274) internal successors, (708), 542 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 708 transitions. [2022-11-03 03:34:22,667 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 708 transitions. Word has length 152 [2022-11-03 03:34:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:22,668 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 708 transitions. [2022-11-03 03:34:22,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.5625) internal successors, (297), 16 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 708 transitions. [2022-11-03 03:34:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:34:22,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:22,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:22,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 03:34:22,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-03 03:34:23,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:23,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:23,285 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:23,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1979225269, now seen corresponding path program 1 times [2022-11-03 03:34:23,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:23,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489828534] [2022-11-03 03:34:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:23,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:23,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:23,289 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:23,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:34:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:24,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:25,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:26,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489828534] [2022-11-03 03:34:26,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489828534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [243748159] [2022-11-03 03:34:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:26,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:26,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:26,341 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:26,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 03:34:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:28,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:28,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:29,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [243748159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:29,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162035483] [2022-11-03 03:34:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:29,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:29,481 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:29,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 03:34:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:31,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162035483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:31,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:34:31,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:34:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001806613] [2022-11-03 03:34:31,612 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:34:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:34:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:34:31,614 INFO L87 Difference]: Start difference. First operand 543 states and 708 transitions. Second operand has 16 states, 16 states have (on average 18.6875) internal successors, (299), 16 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:32,026 INFO L93 Difference]: Finished difference Result 1061 states and 1384 transitions. [2022-11-03 03:34:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:34:32,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.6875) internal successors, (299), 16 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:34:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:32,031 INFO L225 Difference]: With dead ends: 1061 [2022-11-03 03:34:32,031 INFO L226 Difference]: Without dead ends: 912 [2022-11-03 03:34:32,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 889 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:34:32,033 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 342 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:32,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1647 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-11-03 03:34:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-11-03 03:34:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2022-11-03 03:34:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 1.2755214050493964) internal successors, (1162), 911 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1162 transitions. [2022-11-03 03:34:32,080 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1162 transitions. Word has length 152 [2022-11-03 03:34:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:32,080 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1162 transitions. [2022-11-03 03:34:32,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.6875) internal successors, (299), 16 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1162 transitions. [2022-11-03 03:34:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:34:32,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:32,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:32,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 03:34:32,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-03 03:34:32,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:32,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:32,697 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:32,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:32,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2036483571, now seen corresponding path program 1 times [2022-11-03 03:34:32,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:32,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986067392] [2022-11-03 03:34:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:32,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:32,702 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:32,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 03:34:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:34,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:35,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:35,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986067392] [2022-11-03 03:34:35,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986067392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:35,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2144932790] [2022-11-03 03:34:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:35,611 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:35,612 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:35,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 03:34:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:37,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:38,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:38,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2144932790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:38,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788270309] [2022-11-03 03:34:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:38,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:38,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:38,965 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:38,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 03:34:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:39,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:34:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:40,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:41,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788270309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:41,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:34:41,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:34:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067982334] [2022-11-03 03:34:41,203 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:41,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:34:41,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:41,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:34:41,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:34:41,205 INFO L87 Difference]: Start difference. First operand 912 states and 1162 transitions. Second operand has 16 states, 16 states have (on average 18.8125) internal successors, (301), 16 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:41,658 INFO L93 Difference]: Finished difference Result 1823 states and 2322 transitions. [2022-11-03 03:34:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:34:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.8125) internal successors, (301), 16 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:34:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:41,661 INFO L225 Difference]: With dead ends: 1823 [2022-11-03 03:34:41,661 INFO L226 Difference]: Without dead ends: 1674 [2022-11-03 03:34:41,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 889 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:34:41,663 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 454 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:41,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 2134 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-03 03:34:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-11-03 03:34:41,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1630. [2022-11-03 03:34:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 1.2523020257826887) internal successors, (2040), 1629 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2040 transitions. [2022-11-03 03:34:41,750 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2040 transitions. Word has length 152 [2022-11-03 03:34:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:41,751 INFO L495 AbstractCegarLoop]: Abstraction has 1630 states and 2040 transitions. [2022-11-03 03:34:41,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.8125) internal successors, (301), 16 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2040 transitions. [2022-11-03 03:34:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:34:41,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:41,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:41,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 03:34:41,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:42,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:42,380 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1329886965, now seen corresponding path program 1 times [2022-11-03 03:34:42,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:42,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827995487] [2022-11-03 03:34:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:42,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:42,383 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:42,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 03:34:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:34:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:44,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:53,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:53,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827995487] [2022-11-03 03:34:53,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827995487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:53,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [915246446] [2022-11-03 03:34:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:53,974 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:53,978 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:53,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 03:34:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:56,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:34:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:57,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:59,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [915246446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:59,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288524743] [2022-11-03 03:34:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:59,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:59,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:59,879 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:59,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 03:35:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:35:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:35:02,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:35:09,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288524743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:09,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:09,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 13, 13] total 36 [2022-11-03 03:35:09,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748522678] [2022-11-03 03:35:09,699 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:09,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:35:09,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:35:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1142, Unknown=3, NotChecked=0, Total=1260 [2022-11-03 03:35:09,701 INFO L87 Difference]: Start difference. First operand 1630 states and 2040 transitions. Second operand has 36 states, 36 states have (on average 16.666666666666668) internal successors, (600), 36 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:13,518 INFO L93 Difference]: Finished difference Result 2546 states and 3174 transitions. [2022-11-03 03:35:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 03:35:13,519 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.666666666666668) internal successors, (600), 36 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:35:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:13,527 INFO L225 Difference]: With dead ends: 2546 [2022-11-03 03:35:13,527 INFO L226 Difference]: Without dead ends: 2544 [2022-11-03 03:35:13,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 880 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=387, Invalid=3392, Unknown=3, NotChecked=0, Total=3782 [2022-11-03 03:35:13,529 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1211 mSDsluCounter, 6051 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 6325 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1211 Valid, 6325 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 332 Unchecked, 0.3s Time] [2022-11-03 03:35:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-11-03 03:35:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2415. [2022-11-03 03:35:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2414 states have (on average 1.2406793703396852) internal successors, (2995), 2414 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 2995 transitions. [2022-11-03 03:35:13,715 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 2995 transitions. Word has length 152 [2022-11-03 03:35:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:13,716 INFO L495 AbstractCegarLoop]: Abstraction has 2415 states and 2995 transitions. [2022-11-03 03:35:13,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.666666666666668) internal successors, (600), 36 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 2995 transitions. [2022-11-03 03:35:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:35:13,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:13,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:13,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:13,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:14,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:14,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:14,337 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1003505673, now seen corresponding path program 1 times [2022-11-03 03:35:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:14,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716693174] [2022-11-03 03:35:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:14,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:14,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:14,341 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:14,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 03:35:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:35:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:16,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:23,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716693174] [2022-11-03 03:35:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716693174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1469175628] [2022-11-03 03:35:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:23,438 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:23,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 03:35:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:35:25,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:27,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1469175628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655014088] [2022-11-03 03:35:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:29,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:29,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:29,326 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:29,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-03 03:35:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:30,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:35:30,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:35:32,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:35:38,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655014088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:38,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:38,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 38 [2022-11-03 03:35:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775762162] [2022-11-03 03:35:38,766 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:35:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:35:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1285, Unknown=1, NotChecked=0, Total=1406 [2022-11-03 03:35:38,768 INFO L87 Difference]: Start difference. First operand 2415 states and 2995 transitions. Second operand has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:43,029 INFO L93 Difference]: Finished difference Result 4185 states and 5173 transitions. [2022-11-03 03:35:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 03:35:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:35:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:43,041 INFO L225 Difference]: With dead ends: 4185 [2022-11-03 03:35:43,041 INFO L226 Difference]: Without dead ends: 4183 [2022-11-03 03:35:43,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 878 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=399, Invalid=3760, Unknown=1, NotChecked=0, Total=4160 [2022-11-03 03:35:43,044 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1043 mSDsluCounter, 7350 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 7625 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:43,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 7625 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 326 Unchecked, 0.3s Time] [2022-11-03 03:35:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2022-11-03 03:35:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 2439. [2022-11-03 03:35:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2438 states have (on average 1.2432321575061527) internal successors, (3031), 2438 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 3031 transitions. [2022-11-03 03:35:43,246 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 3031 transitions. Word has length 152 [2022-11-03 03:35:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:43,246 INFO L495 AbstractCegarLoop]: Abstraction has 2439 states and 3031 transitions. [2022-11-03 03:35:43,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 3031 transitions. [2022-11-03 03:35:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:35:43,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:43,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:43,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:43,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-03 03:35:43,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:43,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:43,877 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1420902279, now seen corresponding path program 1 times [2022-11-03 03:35:43,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:43,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050454695] [2022-11-03 03:35:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:43,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:43,881 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:43,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 03:35:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:44,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 03:35:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:46,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:55,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:55,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050454695] [2022-11-03 03:35:55,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050454695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:55,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774379582] [2022-11-03 03:35:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:55,479 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:55,480 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:55,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 03:35:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 03:35:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:58,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:01,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774379582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:01,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593860443] [2022-11-03 03:36:01,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:01,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:01,104 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 03:36:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:36:01,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:36:03,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:36:10,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593860443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:10,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:36:10,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 38 [2022-11-03 03:36:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420440464] [2022-11-03 03:36:10,259 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:36:10,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:36:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:36:10,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1283, Unknown=3, NotChecked=0, Total=1406 [2022-11-03 03:36:10,262 INFO L87 Difference]: Start difference. First operand 2439 states and 3031 transitions. Second operand has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:14,300 INFO L93 Difference]: Finished difference Result 4925 states and 6115 transitions. [2022-11-03 03:36:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 03:36:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:36:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:14,310 INFO L225 Difference]: With dead ends: 4925 [2022-11-03 03:36:14,310 INFO L226 Difference]: Without dead ends: 4923 [2022-11-03 03:36:14,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 878 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=399, Invalid=3758, Unknown=3, NotChecked=0, Total=4160 [2022-11-03 03:36:14,313 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 935 mSDsluCounter, 5770 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 5974 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:14,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 5974 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-11-03 03:36:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4923 states. [2022-11-03 03:36:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4923 to 3195. [2022-11-03 03:36:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 1.2514088916718848) internal successors, (3997), 3194 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 3997 transitions. [2022-11-03 03:36:14,515 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 3997 transitions. Word has length 152 [2022-11-03 03:36:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:14,516 INFO L495 AbstractCegarLoop]: Abstraction has 3195 states and 3997 transitions. [2022-11-03 03:36:14,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 3997 transitions. [2022-11-03 03:36:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:36:14,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:14,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:14,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:14,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:14,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-03 03:36:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:15,139 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:36:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1855407877, now seen corresponding path program 1 times [2022-11-03 03:36:15,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:36:15,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377223621] [2022-11-03 03:36:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:15,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:36:15,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:36:15,142 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:36:15,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 03:36:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:36:16,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:17,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:28,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:36:28,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377223621] [2022-11-03 03:36:28,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377223621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:28,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [319505526] [2022-11-03 03:36:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:28,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:36:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:36:28,986 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:36:28,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 03:36:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:36:30,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:32,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:34,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [319505526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:34,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914107840] [2022-11-03 03:36:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:34,698 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:34,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-03 03:36:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:36:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:36:37,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:36:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914107840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:43,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:36:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 38 [2022-11-03 03:36:43,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424112077] [2022-11-03 03:36:43,760 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:36:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:36:43,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:36:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1282, Unknown=4, NotChecked=0, Total=1406 [2022-11-03 03:36:43,762 INFO L87 Difference]: Start difference. First operand 3195 states and 3997 transitions. Second operand has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:48,113 INFO L93 Difference]: Finished difference Result 3561 states and 4521 transitions. [2022-11-03 03:36:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 03:36:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:36:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:48,121 INFO L225 Difference]: With dead ends: 3561 [2022-11-03 03:36:48,121 INFO L226 Difference]: Without dead ends: 3559 [2022-11-03 03:36:48,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 877 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=399, Invalid=3757, Unknown=4, NotChecked=0, Total=4160 [2022-11-03 03:36:48,124 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 1096 mSDsluCounter, 4984 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 5190 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:48,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 5190 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-11-03 03:36:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2022-11-03 03:36:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2475. [2022-11-03 03:36:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 1.259498787388844) internal successors, (3116), 2474 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 3116 transitions. [2022-11-03 03:36:48,306 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 3116 transitions. Word has length 152 [2022-11-03 03:36:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:48,306 INFO L495 AbstractCegarLoop]: Abstraction has 2475 states and 3116 transitions. [2022-11-03 03:36:48,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 15.789473684210526) internal successors, (600), 38 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 3116 transitions. [2022-11-03 03:36:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:36:48,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:48,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:48,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:48,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:48,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 03:36:48,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:36:48,925 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:36:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:48,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2140905339, now seen corresponding path program 1 times [2022-11-03 03:36:48,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:36:48,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121673698] [2022-11-03 03:36:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:48,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:36:48,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:36:48,929 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:36:48,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 03:36:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 03:36:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:52,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:05,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:05,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121673698] [2022-11-03 03:37:05,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121673698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:05,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1555895110] [2022-11-03 03:37:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:05,396 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:37:05,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:37:05,397 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:37:05,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 03:37:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 03:37:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:08,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:12,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1555895110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56294926] [2022-11-03 03:37:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:12,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:12,538 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:12,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-03 03:37:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:37:13,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:37:16,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:37:23,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56294926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:23,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:37:23,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 42 [2022-11-03 03:37:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616945439] [2022-11-03 03:37:23,218 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:37:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 03:37:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:23,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 03:37:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1582, Unknown=4, NotChecked=0, Total=1722 [2022-11-03 03:37:23,220 INFO L87 Difference]: Start difference. First operand 2475 states and 3116 transitions. Second operand has 42 states, 42 states have (on average 14.285714285714286) internal successors, (600), 42 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:30,237 INFO L93 Difference]: Finished difference Result 2895 states and 3714 transitions. [2022-11-03 03:37:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 03:37:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 14.285714285714286) internal successors, (600), 42 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:37:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:30,243 INFO L225 Difference]: With dead ends: 2895 [2022-11-03 03:37:30,243 INFO L226 Difference]: Without dead ends: 2893 [2022-11-03 03:37:30,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 872 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=396, Invalid=4156, Unknown=4, NotChecked=0, Total=4556 [2022-11-03 03:37:30,246 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 765 mSDsluCounter, 6659 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:30,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 6868 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2022-11-03 03:37:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-11-03 03:37:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2803. [2022-11-03 03:37:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 1.2844396859386153) internal successors, (3599), 2802 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 3599 transitions. [2022-11-03 03:37:30,422 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 3599 transitions. Word has length 152 [2022-11-03 03:37:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:30,422 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 3599 transitions. [2022-11-03 03:37:30,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 14.285714285714286) internal successors, (600), 42 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 3599 transitions. [2022-11-03 03:37:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:37:30,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:30,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:30,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:30,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:30,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2022-11-03 03:37:31,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:37:31,041 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash -588221823, now seen corresponding path program 1 times [2022-11-03 03:37:31,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:31,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330654543] [2022-11-03 03:37:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:31,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:31,045 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:31,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 03:37:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:37:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:32,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:33,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:33,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330654543] [2022-11-03 03:37:33,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330654543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:33,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401578341] [2022-11-03 03:37:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:33,564 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:37:33,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:37:33,565 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:37:33,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-03 03:37:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:37:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:36,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:36,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401578341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:36,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578595114] [2022-11-03 03:37:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:36,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:36,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:36,536 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:36,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-03 03:37:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:37:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:38,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:38,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578595114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:38,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:37:38,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:37:38,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77132063] [2022-11-03 03:37:38,721 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:37:38,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:37:38,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:37:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:37:38,722 INFO L87 Difference]: Start difference. First operand 2803 states and 3599 transitions. Second operand has 16 states, 16 states have (on average 18.4375) internal successors, (295), 16 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:39,201 INFO L93 Difference]: Finished difference Result 4123 states and 5339 transitions. [2022-11-03 03:37:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:37:39,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.4375) internal successors, (295), 16 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:37:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:39,206 INFO L225 Difference]: With dead ends: 4123 [2022-11-03 03:37:39,206 INFO L226 Difference]: Without dead ends: 3803 [2022-11-03 03:37:39,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 888 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:37:39,209 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 399 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:39,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 2081 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-11-03 03:37:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3803 states. [2022-11-03 03:37:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3803 to 3507. [2022-11-03 03:37:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3506 states have (on average 1.2721049629207073) internal successors, (4460), 3506 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 4460 transitions. [2022-11-03 03:37:39,425 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 4460 transitions. Word has length 152 [2022-11-03 03:37:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:39,426 INFO L495 AbstractCegarLoop]: Abstraction has 3507 states and 4460 transitions. [2022-11-03 03:37:39,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.4375) internal successors, (295), 16 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 4460 transitions. [2022-11-03 03:37:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:37:39,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:39,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:39,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:39,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-03 03:37:39,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:40,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:40,046 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:40,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:40,047 INFO L85 PathProgramCache]: Analyzing trace with hash -981248833, now seen corresponding path program 1 times [2022-11-03 03:37:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:40,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75832151] [2022-11-03 03:37:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:40,050 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:40,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 03:37:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:37:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:43,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:58,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75832151] [2022-11-03 03:37:58,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75832151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840854687] [2022-11-03 03:37:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:58,753 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:37:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:37:58,754 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:37:58,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-03 03:38:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:00,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:38:00,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:02,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:07,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840854687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:07,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583878258] [2022-11-03 03:38:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:07,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:07,747 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:07,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-03 03:38:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:38:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:11,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:20,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583878258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:20,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:38:20,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 9, 9] total 34 [2022-11-03 03:38:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123804085] [2022-11-03 03:38:20,291 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:20,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:38:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:38:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1000, Unknown=6, NotChecked=0, Total=1122 [2022-11-03 03:38:20,293 INFO L87 Difference]: Start difference. First operand 3507 states and 4460 transitions. Second operand has 34 states, 34 states have (on average 17.11764705882353) internal successors, (582), 34 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:22,485 INFO L93 Difference]: Finished difference Result 4437 states and 5619 transitions. [2022-11-03 03:38:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:38:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 17.11764705882353) internal successors, (582), 34 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:38:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:22,492 INFO L225 Difference]: With dead ends: 4437 [2022-11-03 03:38:22,492 INFO L226 Difference]: Without dead ends: 4435 [2022-11-03 03:38:22,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 873 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=278, Invalid=1786, Unknown=6, NotChecked=0, Total=2070 [2022-11-03 03:38:22,495 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 1112 mSDsluCounter, 4532 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:22,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1112 Valid, 4751 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2022-11-03 03:38:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2022-11-03 03:38:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3645. [2022-11-03 03:38:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 1.2708562019758507) internal successors, (4631), 3644 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 4631 transitions. [2022-11-03 03:38:22,767 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 4631 transitions. Word has length 152 [2022-11-03 03:38:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:22,767 INFO L495 AbstractCegarLoop]: Abstraction has 3645 states and 4631 transitions. [2022-11-03 03:38:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 17.11764705882353) internal successors, (582), 34 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 4631 transitions. [2022-11-03 03:38:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:38:22,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:22,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:22,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:23,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:23,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:23,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:23,397 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:23,398 INFO L85 PathProgramCache]: Analyzing trace with hash -954183231, now seen corresponding path program 1 times [2022-11-03 03:38:23,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:23,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180665630] [2022-11-03 03:38:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:23,401 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:23,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 03:38:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:38:24,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:27,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:39,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:39,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180665630] [2022-11-03 03:38:39,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180665630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2115718290] [2022-11-03 03:38:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:39,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:38:39,478 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:38:39,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 03:38:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:41,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:38:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:43,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:49,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2115718290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:49,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865130077] [2022-11-03 03:38:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:49,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:49,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:49,211 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:49,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 03:38:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:38:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:02,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865130077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:02,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:39:02,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 9, 9] total 36 [2022-11-03 03:39:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014670378] [2022-11-03 03:39:02,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:39:02,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:39:02,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:39:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1136, Unknown=3, NotChecked=0, Total=1260 [2022-11-03 03:39:02,779 INFO L87 Difference]: Start difference. First operand 3645 states and 4631 transitions. Second operand has 36 states, 36 states have (on average 16.166666666666668) internal successors, (582), 36 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:05,426 INFO L93 Difference]: Finished difference Result 4737 states and 5997 transitions. [2022-11-03 03:39:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:39:05,426 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.166666666666668) internal successors, (582), 36 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:39:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:05,432 INFO L225 Difference]: With dead ends: 4737 [2022-11-03 03:39:05,432 INFO L226 Difference]: Without dead ends: 4735 [2022-11-03 03:39:05,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 871 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=295, Invalid=2054, Unknown=3, NotChecked=0, Total=2352 [2022-11-03 03:39:05,434 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 1142 mSDsluCounter, 4480 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 4699 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:05,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 4699 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 85 Unchecked, 0.0s Time] [2022-11-03 03:39:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2022-11-03 03:39:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3649. [2022-11-03 03:39:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.2711074561403508) internal successors, (4637), 3648 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 4637 transitions. [2022-11-03 03:39:05,696 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 4637 transitions. Word has length 152 [2022-11-03 03:39:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:05,696 INFO L495 AbstractCegarLoop]: Abstraction has 3649 states and 4637 transitions. [2022-11-03 03:39:05,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.166666666666668) internal successors, (582), 36 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 4637 transitions. [2022-11-03 03:39:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:39:05,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:05,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:05,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:05,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:06,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 03:39:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:06,316 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash -713943485, now seen corresponding path program 1 times [2022-11-03 03:39:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:06,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467986408] [2022-11-03 03:39:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:06,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:06,319 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:06,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 03:39:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 03:39:07,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:12,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:34,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467986408] [2022-11-03 03:39:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467986408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1343416411] [2022-11-03 03:39:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:34,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:39:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:39:34,314 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:39:34,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 03:39:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 03:39:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:38,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:48,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1343416411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146793385] [2022-11-03 03:39:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:48,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:48,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:48,289 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:48,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 03:39:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:39:49,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:52,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:03,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146793385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:03,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:40:03,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 9, 9] total 40 [2022-11-03 03:40:03,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006604806] [2022-11-03 03:40:03,100 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:03,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:40:03,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:40:03,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:40:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1423, Unknown=6, NotChecked=0, Total=1560 [2022-11-03 03:40:03,102 INFO L87 Difference]: Start difference. First operand 3649 states and 4637 transitions. Second operand has 40 states, 40 states have (on average 14.55) internal successors, (582), 40 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:08,292 INFO L93 Difference]: Finished difference Result 5355 states and 6756 transitions. [2022-11-03 03:40:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:40:08,292 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 14.55) internal successors, (582), 40 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:40:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:08,297 INFO L225 Difference]: With dead ends: 5355 [2022-11-03 03:40:08,298 INFO L226 Difference]: Without dead ends: 5353 [2022-11-03 03:40:08,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=329, Invalid=2635, Unknown=6, NotChecked=0, Total=2970 [2022-11-03 03:40:08,300 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 967 mSDsluCounter, 4264 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 4480 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:08,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 4480 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 84 Unchecked, 0.0s Time] [2022-11-03 03:40:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2022-11-03 03:40:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3767. [2022-11-03 03:40:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 1.2708443972384493) internal successors, (4786), 3766 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 4786 transitions. [2022-11-03 03:40:08,589 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 4786 transitions. Word has length 152 [2022-11-03 03:40:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:08,589 INFO L495 AbstractCegarLoop]: Abstraction has 3767 states and 4786 transitions. [2022-11-03 03:40:08,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 14.55) internal successors, (582), 40 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 4786 transitions. [2022-11-03 03:40:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:40:08,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:08,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:08,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:08,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:09,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-11-03 03:40:09,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:40:09,209 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1687905021, now seen corresponding path program 1 times [2022-11-03 03:40:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:40:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788173888] [2022-11-03 03:40:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:09,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:40:09,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:40:09,214 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:40:09,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 03:40:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:10,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:40:10,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:13,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:26,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:40:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788173888] [2022-11-03 03:40:26,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788173888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:26,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914599416] [2022-11-03 03:40:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:26,619 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:40:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:40:26,620 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:40:26,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 03:40:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:28,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:40:28,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:30,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:36,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914599416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:36,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082723615] [2022-11-03 03:40:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:36,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:36,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:36,334 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:36,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-03 03:40:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 03:40:37,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:41,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:52,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082723615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:52,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:40:52,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 9, 9] total 34 [2022-11-03 03:40:52,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555539592] [2022-11-03 03:40:52,267 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:52,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:40:52,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:40:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:40:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1001, Unknown=5, NotChecked=0, Total=1122 [2022-11-03 03:40:52,270 INFO L87 Difference]: Start difference. First operand 3767 states and 4786 transitions. Second operand has 34 states, 34 states have (on average 17.11764705882353) internal successors, (582), 34 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:54,606 INFO L93 Difference]: Finished difference Result 5775 states and 7340 transitions. [2022-11-03 03:40:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:40:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 17.11764705882353) internal successors, (582), 34 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:40:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:54,612 INFO L225 Difference]: With dead ends: 5775 [2022-11-03 03:40:54,612 INFO L226 Difference]: Without dead ends: 5773 [2022-11-03 03:40:54,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 873 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=278, Invalid=1787, Unknown=5, NotChecked=0, Total=2070 [2022-11-03 03:40:54,614 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1063 mSDsluCounter, 5647 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 5940 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:54,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 5940 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 155 Unchecked, 0.0s Time] [2022-11-03 03:40:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5773 states. [2022-11-03 03:40:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5773 to 3905. [2022-11-03 03:40:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 1.2697233606557377) internal successors, (4957), 3904 states have internal predecessors, (4957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 4957 transitions. [2022-11-03 03:40:54,945 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 4957 transitions. Word has length 152 [2022-11-03 03:40:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:54,946 INFO L495 AbstractCegarLoop]: Abstraction has 3905 states and 4957 transitions. [2022-11-03 03:40:54,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 17.11764705882353) internal successors, (582), 34 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:54,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 4957 transitions. [2022-11-03 03:40:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:40:54,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:54,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:54,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:55,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:55,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:55,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:55,574 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 920882437, now seen corresponding path program 1 times [2022-11-03 03:40:55,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:40:55,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589254722] [2022-11-03 03:40:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:55,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:40:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:40:55,577 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:40:55,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 03:40:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:56,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:40:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:59,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:12,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589254722] [2022-11-03 03:41:12,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589254722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284459263] [2022-11-03 03:41:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:12,949 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:12,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:41:12,950 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:41:12,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-03 03:41:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:41:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:16,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:22,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284459263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326642397] [2022-11-03 03:41:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:22,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:22,446 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:22,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-03 03:41:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:41:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:30,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:40,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326642397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:40,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:41:40,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 11, 11] total 38 [2022-11-03 03:41:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63940347] [2022-11-03 03:41:40,906 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:40,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:41:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:41:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1279, Unknown=7, NotChecked=0, Total=1406 [2022-11-03 03:41:40,908 INFO L87 Difference]: Start difference. First operand 3905 states and 4957 transitions. Second operand has 38 states, 38 states have (on average 15.736842105263158) internal successors, (598), 38 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:53,047 INFO L93 Difference]: Finished difference Result 5703 states and 7164 transitions. [2022-11-03 03:41:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:41:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 15.736842105263158) internal successors, (598), 38 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:41:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:53,053 INFO L225 Difference]: With dead ends: 5703 [2022-11-03 03:41:53,053 INFO L226 Difference]: Without dead ends: 5701 [2022-11-03 03:41:53,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 865 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=266, Invalid=2479, Unknown=11, NotChecked=0, Total=2756 [2022-11-03 03:41:53,055 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 376 mSDsluCounter, 4500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 4694 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:53,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 4694 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 96 Unchecked, 0.0s Time] [2022-11-03 03:41:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2022-11-03 03:41:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4029. [2022-11-03 03:41:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 4028 states have (on average 1.2678748758689176) internal successors, (5107), 4028 states have internal predecessors, (5107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 5107 transitions. [2022-11-03 03:41:53,382 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 5107 transitions. Word has length 152 [2022-11-03 03:41:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:53,383 INFO L495 AbstractCegarLoop]: Abstraction has 4029 states and 5107 transitions. [2022-11-03 03:41:53,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 15.736842105263158) internal successors, (598), 38 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 5107 transitions. [2022-11-03 03:41:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:41:53,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:53,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:53,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2022-11-03 03:41:53,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:53,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-11-03 03:41:53,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:53,988 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash 920942019, now seen corresponding path program 1 times [2022-11-03 03:41:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:53,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901165807] [2022-11-03 03:41:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:53,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:53,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:53,991 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:53,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 03:41:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:55,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:41:55,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:57,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:09,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901165807] [2022-11-03 03:42:09,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901165807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1049784521] [2022-11-03 03:42:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:09,619 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:42:09,620 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:42:09,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 03:42:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:42:11,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:13,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:19,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1049784521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:19,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788535424] [2022-11-03 03:42:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:19,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:19,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:19,279 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:19,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-03 03:42:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:20,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 03:42:20,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:25,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:52,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788535424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:52,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:42:52,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 44 [2022-11-03 03:42:52,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683009604] [2022-11-03 03:42:52,891 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:42:52,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 03:42:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 03:42:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1690, Unknown=7, NotChecked=0, Total=1892 [2022-11-03 03:42:52,893 INFO L87 Difference]: Start difference. First operand 4029 states and 5107 transitions. Second operand has 44 states, 44 states have (on average 13.409090909090908) internal successors, (590), 44 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:04,808 INFO L93 Difference]: Finished difference Result 6712 states and 8593 transitions. [2022-11-03 03:43:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 03:43:04,808 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 13.409090909090908) internal successors, (590), 44 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:43:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:04,812 INFO L225 Difference]: With dead ends: 6712 [2022-11-03 03:43:04,812 INFO L226 Difference]: Without dead ends: 6710 [2022-11-03 03:43:04,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 864 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=439, Invalid=3460, Unknown=7, NotChecked=0, Total=3906 [2022-11-03 03:43:04,814 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1433 mSDsluCounter, 4963 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 5161 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:04,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1433 Valid, 5161 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 146 Unchecked, 0.0s Time] [2022-11-03 03:43:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2022-11-03 03:43:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 6634. [2022-11-03 03:43:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 1.2795115332428766) internal successors, (8487), 6633 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 8487 transitions. [2022-11-03 03:43:05,254 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 8487 transitions. Word has length 152 [2022-11-03 03:43:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:05,254 INFO L495 AbstractCegarLoop]: Abstraction has 6634 states and 8487 transitions. [2022-11-03 03:43:05,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 13.409090909090908) internal successors, (590), 44 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 8487 transitions. [2022-11-03 03:43:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:43:05,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:05,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:05,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:05,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 03:43:05,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-03 03:43:05,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:05,879 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash 111595393, now seen corresponding path program 1 times [2022-11-03 03:43:05,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:05,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012344796] [2022-11-03 03:43:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:05,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:05,882 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:05,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 03:43:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:43:06,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:09,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:21,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:21,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012344796] [2022-11-03 03:43:21,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012344796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:21,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971041340] [2022-11-03 03:43:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:21,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:21,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:21,857 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:21,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 03:43:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:43:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:25,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1971041340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816325461] [2022-11-03 03:43:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:31,564 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:31,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-03 03:43:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:43:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:43:35,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:43:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816325461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:44,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:43:44,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 44 [2022-11-03 03:43:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579124799] [2022-11-03 03:43:44,758 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:44,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 03:43:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 03:43:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1749, Unknown=2, NotChecked=0, Total=1892 [2022-11-03 03:43:44,760 INFO L87 Difference]: Start difference. First operand 6634 states and 8487 transitions. Second operand has 44 states, 44 states have (on average 13.636363636363637) internal successors, (600), 44 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:55,480 INFO L93 Difference]: Finished difference Result 10243 states and 13365 transitions. [2022-11-03 03:43:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 03:43:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 13.636363636363637) internal successors, (600), 44 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:43:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:55,487 INFO L225 Difference]: With dead ends: 10243 [2022-11-03 03:43:55,488 INFO L226 Difference]: Without dead ends: 10241 [2022-11-03 03:43:55,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 872 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=415, Invalid=4695, Unknown=2, NotChecked=0, Total=5112 [2022-11-03 03:43:55,490 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1231 mSDsluCounter, 7783 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 8039 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 581 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:55,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1231 Valid, 8039 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 581 Unchecked, 0.4s Time] [2022-11-03 03:43:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2022-11-03 03:43:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6963. [2022-11-03 03:43:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6962 states have (on average 1.2798046538351049) internal successors, (8910), 6962 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 8910 transitions. [2022-11-03 03:43:56,086 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 8910 transitions. Word has length 152 [2022-11-03 03:43:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:56,086 INFO L495 AbstractCegarLoop]: Abstraction has 6963 states and 8910 transitions. [2022-11-03 03:43:56,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 13.636363636363637) internal successors, (600), 44 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 8910 transitions. [2022-11-03 03:43:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:43:56,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:56,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:56,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:56,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-03 03:43:56,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:56,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:56,697 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:56,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1660839419, now seen corresponding path program 1 times [2022-11-03 03:43:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:56,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555087046] [2022-11-03 03:43:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:56,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:56,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:56,701 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:56,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 03:43:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:57,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:43:57,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:00,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:15,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555087046] [2022-11-03 03:44:15,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555087046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854592299] [2022-11-03 03:44:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:15,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:15,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:15,672 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:15,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 03:44:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:44:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:19,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:26,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854592299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273824185] [2022-11-03 03:44:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:26,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:26,113 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:26,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 03:44:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 03:44:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:31,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:44,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273824185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:44,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:44:44,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 9, 9] total 36 [2022-11-03 03:44:44,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977786259] [2022-11-03 03:44:44,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:44:44,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:44:44,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:44,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:44:44,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1133, Unknown=6, NotChecked=0, Total=1260 [2022-11-03 03:44:44,488 INFO L87 Difference]: Start difference. First operand 6963 states and 8910 transitions. Second operand has 36 states, 36 states have (on average 16.166666666666668) internal successors, (582), 36 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:47,887 INFO L93 Difference]: Finished difference Result 11547 states and 14658 transitions. [2022-11-03 03:44:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:44:47,889 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.166666666666668) internal successors, (582), 36 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:44:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:47,898 INFO L225 Difference]: With dead ends: 11547 [2022-11-03 03:44:47,898 INFO L226 Difference]: Without dead ends: 11545 [2022-11-03 03:44:47,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 871 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=295, Invalid=2051, Unknown=6, NotChecked=0, Total=2352 [2022-11-03 03:44:47,901 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1058 mSDsluCounter, 6039 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:47,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 6332 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-11-03 03:44:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11545 states. [2022-11-03 03:44:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11545 to 7103. [2022-11-03 03:44:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 1.2790763165305548) internal successors, (9084), 7102 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 9084 transitions. [2022-11-03 03:44:48,459 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 9084 transitions. Word has length 152 [2022-11-03 03:44:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:48,460 INFO L495 AbstractCegarLoop]: Abstraction has 7103 states and 9084 transitions. [2022-11-03 03:44:48,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.166666666666668) internal successors, (582), 36 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 9084 transitions. [2022-11-03 03:44:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:44:48,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:48,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:48,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-11-03 03:44:48,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 03:44:48,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 03:44:49,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:49,066 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:49,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:49,067 INFO L85 PathProgramCache]: Analyzing trace with hash 947948039, now seen corresponding path program 1 times [2022-11-03 03:44:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:49,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934700638] [2022-11-03 03:44:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:49,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:49,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:49,070 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:49,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 03:44:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:44:50,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:53,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:07,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:45:07,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934700638] [2022-11-03 03:45:07,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934700638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:07,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458816140] [2022-11-03 03:45:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:07,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:45:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:45:07,252 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:45:07,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c479-27ad-4281-9862-56ef03952848/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process