./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a889f150dc2c455e03355eaf9dfccf3bdcd55e31f50409b2096126a8e217346 --- 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-38b53e6 [2022-11-25 16:42:35,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:42:35,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:42:35,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:42:35,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:42:35,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:42:35,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:42:35,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:42:35,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:42:35,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:42:35,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:42:35,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:42:35,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:42:35,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:42:35,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:42:35,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:42:35,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:42:35,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:42:35,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:42:35,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:42:35,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:42:35,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:42:35,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:42:35,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:42:35,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:42:35,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:42:35,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:42:35,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:42:35,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:42:35,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:42:35,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:42:35,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:42:35,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:42:35,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:42:35,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:42:35,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:42:35,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:42:35,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:42:35,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:42:35,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:42:35,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:42:35,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:42:35,705 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:42:35,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:42:35,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:42:35,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:42:35,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:42:35,706 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:42:35,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:42:35,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:42:35,707 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:42:35,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:42:35,708 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:42:35,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:42:35,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:42:35,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:42:35,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:42:35,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:42:35,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:42:35,709 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:42:35,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:42:35,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:42:35,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:42:35,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:42:35,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:42:35,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:42:35,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:35,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:42:35,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:42:35,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:42:35,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:42:35,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:42:35,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:42:35,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:42:35,712 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:42:35,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:42:35,712 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a889f150dc2c455e03355eaf9dfccf3bdcd55e31f50409b2096126a8e217346 [2022-11-25 16:42:36,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:42:36,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:42:36,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:42:36,094 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:42:36,095 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:42:36,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/eca-rers2012/Problem11_label48.c [2022-11-25 16:42:39,078 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:42:39,467 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:42:39,468 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/sv-benchmarks/c/eca-rers2012/Problem11_label48.c [2022-11-25 16:42:39,492 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/data/e2741ea42/157de3cbc5da43f59bc894989b224699/FLAG9ae7fe2f1 [2022-11-25 16:42:39,512 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/data/e2741ea42/157de3cbc5da43f59bc894989b224699 [2022-11-25 16:42:39,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:42:39,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:42:39,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:39,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:42:39,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:42:39,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:39" (1/1) ... [2022-11-25 16:42:39,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61595b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:39, skipping insertion in model container [2022-11-25 16:42:39,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:39" (1/1) ... [2022-11-25 16:42:39,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:42:39,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:42:39,840 WARN L237 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_063dff79-6c28-487e-ab26-021763d42ee4/sv-benchmarks/c/eca-rers2012/Problem11_label48.c[7294,7307] [2022-11-25 16:42:40,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:40,165 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:42:40,220 WARN L237 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_063dff79-6c28-487e-ab26-021763d42ee4/sv-benchmarks/c/eca-rers2012/Problem11_label48.c[7294,7307] [2022-11-25 16:42:40,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:40,483 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:42:40,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40 WrapperNode [2022-11-25 16:42:40,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:40,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:40,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:42:40,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:42:40,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,624 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2022-11-25 16:42:40,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:40,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:42:40,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:42:40,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:42:40,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:42:40,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:42:40,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:42:40,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:42:40,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (1/1) ... [2022-11-25 16:42:40,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:40,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:40,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:42:40,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:42:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:42:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:42:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:42:40,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:42:40,946 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:42:40,949 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:42:42,939 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:42:42,965 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:42:42,971 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 16:42:42,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:42 BoogieIcfgContainer [2022-11-25 16:42:42,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:42:42,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:42:42,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:42:42,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:42:42,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:42:39" (1/3) ... [2022-11-25 16:42:42,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c958c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:42, skipping insertion in model container [2022-11-25 16:42:42,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:40" (2/3) ... [2022-11-25 16:42:42,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c958c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:42, skipping insertion in model container [2022-11-25 16:42:42,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:42" (3/3) ... [2022-11-25 16:42:42,984 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label48.c [2022-11-25 16:42:43,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:42:43,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:42:43,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:43,090 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f0ce0d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:43,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:42:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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) [2022-11-25 16:42:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 16:42:43,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:43,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:43,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2022-11-25 16:42:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:43,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204560445] [2022-11-25 16:42:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:43,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:43,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204560445] [2022-11-25 16:42:43,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204560445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:43,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:43,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232065573] [2022-11-25 16:42:43,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:43,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:43,690 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-11-25 16:42:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:45,137 INFO L93 Difference]: Finished difference Result 769 states and 1360 transitions. [2022-11-25 16:42:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 50 [2022-11-25 16:42:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:45,152 INFO L225 Difference]: With dead ends: 769 [2022-11-25 16:42:45,153 INFO L226 Difference]: Without dead ends: 422 [2022-11-25 16:42:45,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:45,160 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 190 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:45,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 16:42:45,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-25 16:42:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2022-11-25 16:42:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 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) [2022-11-25 16:42:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions. [2022-11-25 16:42:45,219 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 50 [2022-11-25 16:42:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:45,220 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 626 transitions. [2022-11-25 16:42:45,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-11-25 16:42:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions. [2022-11-25 16:42:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 16:42:45,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:45,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:45,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:42:45,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1807266807, now seen corresponding path program 1 times [2022-11-25 16:42:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:45,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096388869] [2022-11-25 16:42:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:45,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:45,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096388869] [2022-11-25 16:42:45,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096388869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:45,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:45,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:45,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942565665] [2022-11-25 16:42:45,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:45,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:45,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:45,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:45,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:45,416 INFO L87 Difference]: Start difference. First operand 412 states and 626 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-11-25 16:42:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:46,481 INFO L93 Difference]: Finished difference Result 1194 states and 1821 transitions. [2022-11-25 16:42:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:46,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 116 [2022-11-25 16:42:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:46,486 INFO L225 Difference]: With dead ends: 1194 [2022-11-25 16:42:46,486 INFO L226 Difference]: Without dead ends: 784 [2022-11-25 16:42:46,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:46,489 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:46,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:42:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-11-25 16:42:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-11-25 16:42:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 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) [2022-11-25 16:42:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions. [2022-11-25 16:42:46,542 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 116 [2022-11-25 16:42:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:46,544 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions. [2022-11-25 16:42:46,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-11-25 16:42:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions. [2022-11-25 16:42:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 16:42:46,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:46,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:46,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:42:46,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash -66853459, now seen corresponding path program 1 times [2022-11-25 16:42:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:46,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964465368] [2022-11-25 16:42:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:47,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:47,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964465368] [2022-11-25 16:42:47,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964465368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:47,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:47,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:47,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891238252] [2022-11-25 16:42:47,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:47,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:47,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:47,150 INFO L87 Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2022-11-25 16:42:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:48,184 INFO L93 Difference]: Finished difference Result 1936 states and 2599 transitions. [2022-11-25 16:42:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 120 [2022-11-25 16:42:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:48,189 INFO L225 Difference]: With dead ends: 1936 [2022-11-25 16:42:48,190 INFO L226 Difference]: Without dead ends: 1154 [2022-11-25 16:42:48,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:48,193 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:48,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:42:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-11-25 16:42:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2022-11-25 16:42:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 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) [2022-11-25 16:42:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions. [2022-11-25 16:42:48,250 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 120 [2022-11-25 16:42:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:48,252 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions. [2022-11-25 16:42:48,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2022-11-25 16:42:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions. [2022-11-25 16:42:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-25 16:42:48,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:48,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:48,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:42:48,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2125699946, now seen corresponding path program 1 times [2022-11-25 16:42:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:48,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983722091] [2022-11-25 16:42:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:48,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983722091] [2022-11-25 16:42:48,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983722091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:48,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:48,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449571609] [2022-11-25 16:42:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:48,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:48,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:48,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:48,482 INFO L87 Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2022-11-25 16:42:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:49,549 INFO L93 Difference]: Finished difference Result 2679 states and 3481 transitions. [2022-11-25 16:42:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 162 [2022-11-25 16:42:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:49,554 INFO L225 Difference]: With dead ends: 2679 [2022-11-25 16:42:49,554 INFO L226 Difference]: Without dead ends: 1712 [2022-11-25 16:42:49,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:49,558 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 156 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:49,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 332 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:42:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-11-25 16:42:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1521. [2022-11-25 16:42:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.255921052631579) internal successors, (1909), 1520 states have internal predecessors, (1909), 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) [2022-11-25 16:42:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1909 transitions. [2022-11-25 16:42:49,597 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1909 transitions. Word has length 162 [2022-11-25 16:42:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:49,598 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 1909 transitions. [2022-11-25 16:42:49,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2022-11-25 16:42:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1909 transitions. [2022-11-25 16:42:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-25 16:42:49,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:49,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:42:49,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1101521033, now seen corresponding path program 1 times [2022-11-25 16:42:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373815567] [2022-11-25 16:42:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:49,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 16:42:49,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:49,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373815567] [2022-11-25 16:42:49,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373815567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:49,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:49,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263342729] [2022-11-25 16:42:49,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:49,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:49,957 INFO L87 Difference]: Start difference. First operand 1521 states and 1909 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-25 16:42:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:51,078 INFO L93 Difference]: Finished difference Result 3597 states and 4559 transitions. [2022-11-25 16:42:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 232 [2022-11-25 16:42:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:51,087 INFO L225 Difference]: With dead ends: 3597 [2022-11-25 16:42:51,088 INFO L226 Difference]: Without dead ends: 2078 [2022-11-25 16:42:51,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,094 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 147 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:51,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 391 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:42:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-11-25 16:42:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1889. [2022-11-25 16:42:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 1.2473516949152543) internal successors, (2355), 1888 states have internal predecessors, (2355), 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) [2022-11-25 16:42:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2355 transitions. [2022-11-25 16:42:51,137 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2355 transitions. Word has length 232 [2022-11-25 16:42:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:51,138 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 2355 transitions. [2022-11-25 16:42:51,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-25 16:42:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2355 transitions. [2022-11-25 16:42:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-25 16:42:51,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:51,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:51,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:42:51,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash 697992722, now seen corresponding path program 1 times [2022-11-25 16:42:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:51,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430837772] [2022-11-25 16:42:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:51,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430837772] [2022-11-25 16:42:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430837772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:51,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:51,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:51,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068466126] [2022-11-25 16:42:51,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:51,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:51,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,522 INFO L87 Difference]: Start difference. First operand 1889 states and 2355 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2022-11-25 16:42:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:52,601 INFO L93 Difference]: Finished difference Result 5077 states and 6327 transitions. [2022-11-25 16:42:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:52,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 259 [2022-11-25 16:42:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:52,613 INFO L225 Difference]: With dead ends: 5077 [2022-11-25 16:42:52,614 INFO L226 Difference]: Without dead ends: 3190 [2022-11-25 16:42:52,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:52,620 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 123 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:52,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 141 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:42:52,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2022-11-25 16:42:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3186. [2022-11-25 16:42:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 1.2160125588697017) internal successors, (3873), 3185 states have internal predecessors, (3873), 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) [2022-11-25 16:42:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3873 transitions. [2022-11-25 16:42:52,695 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3873 transitions. Word has length 259 [2022-11-25 16:42:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:52,696 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 3873 transitions. [2022-11-25 16:42:52,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2022-11-25 16:42:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3873 transitions. [2022-11-25 16:42:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-25 16:42:52,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:52,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:52,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:42:52,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash 387212821, now seen corresponding path program 1 times [2022-11-25 16:42:52,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:52,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521173243] [2022-11-25 16:42:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:52,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-25 16:42:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521173243] [2022-11-25 16:42:53,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521173243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:53,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:53,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:53,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933551944] [2022-11-25 16:42:53,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:53,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:53,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:53,310 INFO L87 Difference]: Start difference. First operand 3186 states and 3873 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-25 16:42:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:54,356 INFO L93 Difference]: Finished difference Result 8220 states and 9834 transitions. [2022-11-25 16:42:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 265 [2022-11-25 16:42:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:54,373 INFO L225 Difference]: With dead ends: 8220 [2022-11-25 16:42:54,373 INFO L226 Difference]: Without dead ends: 5036 [2022-11-25 16:42:54,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:54,381 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 171 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:54,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 392 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:42:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2022-11-25 16:42:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 5035. [2022-11-25 16:42:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5034 states have (on average 1.1835518474374256) internal successors, (5958), 5034 states have internal predecessors, (5958), 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) [2022-11-25 16:42:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 5958 transitions. [2022-11-25 16:42:54,533 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 5958 transitions. Word has length 265 [2022-11-25 16:42:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:54,534 INFO L495 AbstractCegarLoop]: Abstraction has 5035 states and 5958 transitions. [2022-11-25 16:42:54,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-25 16:42:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 5958 transitions. [2022-11-25 16:42:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-25 16:42:54,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:54,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:54,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:42:54,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash -914056920, now seen corresponding path program 1 times [2022-11-25 16:42:54,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:54,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817225319] [2022-11-25 16:42:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:55,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817225319] [2022-11-25 16:42:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817225319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164370503] [2022-11-25 16:42:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:55,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:55,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:55,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:42:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:42:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 16:42:56,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:56,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164370503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:56,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:56,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-25 16:42:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919981577] [2022-11-25 16:42:56,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:56,728 INFO L87 Difference]: Start difference. First operand 5035 states and 5958 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-25 16:42:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:58,401 INFO L93 Difference]: Finished difference Result 13958 states and 16430 transitions. [2022-11-25 16:42:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 268 [2022-11-25 16:42:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:58,435 INFO L225 Difference]: With dead ends: 13958 [2022-11-25 16:42:58,436 INFO L226 Difference]: Without dead ends: 9293 [2022-11-25 16:42:58,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:58,443 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 274 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:58,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 192 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 16:42:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2022-11-25 16:42:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 4667. [2022-11-25 16:42:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 1.1941705957994) internal successors, (5572), 4666 states have internal predecessors, (5572), 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) [2022-11-25 16:42:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 5572 transitions. [2022-11-25 16:42:58,623 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 5572 transitions. Word has length 268 [2022-11-25 16:42:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:58,623 INFO L495 AbstractCegarLoop]: Abstraction has 4667 states and 5572 transitions. [2022-11-25 16:42:58,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-25 16:42:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 5572 transitions. [2022-11-25 16:42:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-25 16:42:58,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:58,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:58,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:58,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:58,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:58,838 INFO L85 PathProgramCache]: Analyzing trace with hash 448170155, now seen corresponding path program 1 times [2022-11-25 16:42:58,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:58,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470440414] [2022-11-25 16:42:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:58,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:59,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470440414] [2022-11-25 16:42:59,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470440414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:59,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:59,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:42:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836771581] [2022-11-25 16:42:59,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:59,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:59,664 INFO L87 Difference]: Start difference. First operand 4667 states and 5572 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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) [2022-11-25 16:43:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:02,497 INFO L93 Difference]: Finished difference Result 15972 states and 19215 transitions. [2022-11-25 16:43:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:43:02,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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 269 [2022-11-25 16:43:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:02,531 INFO L225 Difference]: With dead ends: 15972 [2022-11-25 16:43:02,531 INFO L226 Difference]: Without dead ends: 11307 [2022-11-25 16:43:02,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:02,540 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 376 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:02,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 152 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 16:43:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11307 states. [2022-11-25 16:43:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11307 to 10930. [2022-11-25 16:43:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10930 states, 10929 states have (on average 1.1707384024155916) internal successors, (12795), 10929 states have internal predecessors, (12795), 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) [2022-11-25 16:43:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10930 states to 10930 states and 12795 transitions. [2022-11-25 16:43:02,789 INFO L78 Accepts]: Start accepts. Automaton has 10930 states and 12795 transitions. Word has length 269 [2022-11-25 16:43:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:02,790 INFO L495 AbstractCegarLoop]: Abstraction has 10930 states and 12795 transitions. [2022-11-25 16:43:02,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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) [2022-11-25 16:43:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10930 states and 12795 transitions. [2022-11-25 16:43:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-11-25 16:43:02,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:02,802 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:02,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:43:02,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash 510762410, now seen corresponding path program 1 times [2022-11-25 16:43:02,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:02,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630875316] [2022-11-25 16:43:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-25 16:43:03,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:03,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630875316] [2022-11-25 16:43:03,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630875316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:03,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:03,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:03,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141137871] [2022-11-25 16:43:03,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:03,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:03,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:03,124 INFO L87 Difference]: Start difference. First operand 10930 states and 12795 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-25 16:43:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:04,235 INFO L93 Difference]: Finished difference Result 21488 states and 25200 transitions. [2022-11-25 16:43:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 280 [2022-11-25 16:43:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:04,263 INFO L225 Difference]: With dead ends: 21488 [2022-11-25 16:43:04,263 INFO L226 Difference]: Without dead ends: 10928 [2022-11-25 16:43:04,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:04,274 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 185 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:04,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 304 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2022-11-25 16:43:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 10744. [2022-11-25 16:43:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10744 states, 10743 states have (on average 1.141952899562506) internal successors, (12268), 10743 states have internal predecessors, (12268), 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) [2022-11-25 16:43:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10744 states to 10744 states and 12268 transitions. [2022-11-25 16:43:04,502 INFO L78 Accepts]: Start accepts. Automaton has 10744 states and 12268 transitions. Word has length 280 [2022-11-25 16:43:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:04,502 INFO L495 AbstractCegarLoop]: Abstraction has 10744 states and 12268 transitions. [2022-11-25 16:43:04,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-25 16:43:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 10744 states and 12268 transitions. [2022-11-25 16:43:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-25 16:43:04,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:04,512 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:04,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:43:04,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:04,514 INFO L85 PathProgramCache]: Analyzing trace with hash 577294273, now seen corresponding path program 1 times [2022-11-25 16:43:04,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:04,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864382649] [2022-11-25 16:43:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:04,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 95 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:05,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864382649] [2022-11-25 16:43:05,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864382649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:05,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102030261] [2022-11-25 16:43:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:05,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:05,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:05,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:05,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:43:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:05,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:43:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:05,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:05,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102030261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:05,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:05,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-25 16:43:05,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591410391] [2022-11-25 16:43:05,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:05,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:05,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:05,606 INFO L87 Difference]: Start difference. First operand 10744 states and 12268 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2022-11-25 16:43:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:06,787 INFO L93 Difference]: Finished difference Result 22426 states and 25761 transitions. [2022-11-25 16:43:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 283 [2022-11-25 16:43:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:06,809 INFO L225 Difference]: With dead ends: 22426 [2022-11-25 16:43:06,809 INFO L226 Difference]: Without dead ends: 12052 [2022-11-25 16:43:06,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:06,820 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 99 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:06,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 342 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12052 states. [2022-11-25 16:43:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12043. [2022-11-25 16:43:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12043 states, 12042 states have (on average 1.143996013951171) internal successors, (13776), 12042 states have internal predecessors, (13776), 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) [2022-11-25 16:43:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12043 states to 12043 states and 13776 transitions. [2022-11-25 16:43:07,040 INFO L78 Accepts]: Start accepts. Automaton has 12043 states and 13776 transitions. Word has length 283 [2022-11-25 16:43:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:07,040 INFO L495 AbstractCegarLoop]: Abstraction has 12043 states and 13776 transitions. [2022-11-25 16:43:07,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2022-11-25 16:43:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 12043 states and 13776 transitions. [2022-11-25 16:43:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-25 16:43:07,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:07,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:07,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:07,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:07,254 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1277495970, now seen corresponding path program 1 times [2022-11-25 16:43:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:07,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754578450] [2022-11-25 16:43:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:07,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:07,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754578450] [2022-11-25 16:43:07,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754578450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:07,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:07,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:43:07,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955762336] [2022-11-25 16:43:07,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:07,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:07,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:07,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:07,787 INFO L87 Difference]: Start difference. First operand 12043 states and 13776 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 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) [2022-11-25 16:43:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:09,627 INFO L93 Difference]: Finished difference Result 26298 states and 30094 transitions. [2022-11-25 16:43:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 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) Word has length 286 [2022-11-25 16:43:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:09,654 INFO L225 Difference]: With dead ends: 26298 [2022-11-25 16:43:09,654 INFO L226 Difference]: Without dead ends: 14625 [2022-11-25 16:43:09,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:09,665 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 267 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:09,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 97 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 16:43:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14625 states. [2022-11-25 16:43:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14625 to 14619. [2022-11-25 16:43:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14618 states have (on average 1.1313449172253387) internal successors, (16538), 14618 states have internal predecessors, (16538), 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) [2022-11-25 16:43:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 16538 transitions. [2022-11-25 16:43:09,916 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 16538 transitions. Word has length 286 [2022-11-25 16:43:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:09,917 INFO L495 AbstractCegarLoop]: Abstraction has 14619 states and 16538 transitions. [2022-11-25 16:43:09,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 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) [2022-11-25 16:43:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 16538 transitions. [2022-11-25 16:43:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-25 16:43:09,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:09,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:09,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 16:43:09,926 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:09,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1227652913, now seen corresponding path program 1 times [2022-11-25 16:43:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:09,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023738635] [2022-11-25 16:43:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:09,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:10,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:10,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023738635] [2022-11-25 16:43:10,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023738635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:10,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:10,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:43:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422553741] [2022-11-25 16:43:10,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:10,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:10,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:10,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:10,604 INFO L87 Difference]: Start difference. First operand 14619 states and 16538 transitions. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 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) [2022-11-25 16:43:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:12,419 INFO L93 Difference]: Finished difference Result 30912 states and 35030 transitions. [2022-11-25 16:43:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 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) Word has length 288 [2022-11-25 16:43:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:12,450 INFO L225 Difference]: With dead ends: 30912 [2022-11-25 16:43:12,450 INFO L226 Difference]: Without dead ends: 16663 [2022-11-25 16:43:12,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:12,465 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 252 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:12,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 178 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 16:43:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16663 states. [2022-11-25 16:43:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16663 to 15550. [2022-11-25 16:43:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15550 states, 15549 states have (on average 1.1291401376294294) internal successors, (17557), 15549 states have internal predecessors, (17557), 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) [2022-11-25 16:43:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15550 states to 15550 states and 17557 transitions. [2022-11-25 16:43:12,701 INFO L78 Accepts]: Start accepts. Automaton has 15550 states and 17557 transitions. Word has length 288 [2022-11-25 16:43:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:12,702 INFO L495 AbstractCegarLoop]: Abstraction has 15550 states and 17557 transitions. [2022-11-25 16:43:12,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 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) [2022-11-25 16:43:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 15550 states and 17557 transitions. [2022-11-25 16:43:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-11-25 16:43:12,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:12,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:12,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:43:12,714 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash 100748151, now seen corresponding path program 1 times [2022-11-25 16:43:12,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748990714] [2022-11-25 16:43:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:12,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 16:43:13,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748990714] [2022-11-25 16:43:13,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748990714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:13,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:13,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421373788] [2022-11-25 16:43:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:13,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:13,062 INFO L87 Difference]: Start difference. First operand 15550 states and 17557 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2022-11-25 16:43:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:14,249 INFO L93 Difference]: Finished difference Result 33857 states and 38353 transitions. [2022-11-25 16:43:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 312 [2022-11-25 16:43:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:14,282 INFO L225 Difference]: With dead ends: 33857 [2022-11-25 16:43:14,282 INFO L226 Difference]: Without dead ends: 18677 [2022-11-25 16:43:14,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:14,293 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 152 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:14,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 357 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18677 states. [2022-11-25 16:43:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18677 to 17573. [2022-11-25 16:43:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17573 states, 17572 states have (on average 1.1226951969041656) internal successors, (19728), 17572 states have internal predecessors, (19728), 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) [2022-11-25 16:43:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17573 states to 17573 states and 19728 transitions. [2022-11-25 16:43:14,554 INFO L78 Accepts]: Start accepts. Automaton has 17573 states and 19728 transitions. Word has length 312 [2022-11-25 16:43:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:14,554 INFO L495 AbstractCegarLoop]: Abstraction has 17573 states and 19728 transitions. [2022-11-25 16:43:14,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2022-11-25 16:43:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 17573 states and 19728 transitions. [2022-11-25 16:43:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-11-25 16:43:14,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:14,568 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:14,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 16:43:14,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1462001354, now seen corresponding path program 1 times [2022-11-25 16:43:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:14,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486202045] [2022-11-25 16:43:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:14,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 221 proven. 72 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 16:43:15,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:15,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486202045] [2022-11-25 16:43:15,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486202045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:15,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202628271] [2022-11-25 16:43:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:15,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:15,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:15,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:15,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:43:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:43:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-25 16:43:16,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:16,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202628271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:16,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:16,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-25 16:43:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977037643] [2022-11-25 16:43:16,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:16,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:16,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:16,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:16,396 INFO L87 Difference]: Start difference. First operand 17573 states and 19728 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-25 16:43:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:17,322 INFO L93 Difference]: Finished difference Result 37361 states and 41940 transitions. [2022-11-25 16:43:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 337 [2022-11-25 16:43:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:17,351 INFO L225 Difference]: With dead ends: 37361 [2022-11-25 16:43:17,351 INFO L226 Difference]: Without dead ends: 19974 [2022-11-25 16:43:17,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:17,362 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 84 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:17,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 365 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:43:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19974 states. [2022-11-25 16:43:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19974 to 19235. [2022-11-25 16:43:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19235 states, 19234 states have (on average 1.116928356036186) internal successors, (21483), 19234 states have internal predecessors, (21483), 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) [2022-11-25 16:43:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19235 states to 19235 states and 21483 transitions. [2022-11-25 16:43:17,643 INFO L78 Accepts]: Start accepts. Automaton has 19235 states and 21483 transitions. Word has length 337 [2022-11-25 16:43:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:17,644 INFO L495 AbstractCegarLoop]: Abstraction has 19235 states and 21483 transitions. [2022-11-25 16:43:17,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-25 16:43:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 19235 states and 21483 transitions. [2022-11-25 16:43:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-11-25 16:43:17,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:17,657 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:17,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:17,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:17,863 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1351852439, now seen corresponding path program 1 times [2022-11-25 16:43:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:17,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480018920] [2022-11-25 16:43:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:17,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 254 proven. 54 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-25 16:43:18,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:18,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480018920] [2022-11-25 16:43:18,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480018920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:18,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675089243] [2022-11-25 16:43:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:18,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:18,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:18,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:18,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:43:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:19,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:43:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-25 16:43:19,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:19,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675089243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:19,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:19,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-25 16:43:19,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694569474] [2022-11-25 16:43:19,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:19,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:19,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:19,604 INFO L87 Difference]: Start difference. First operand 19235 states and 21483 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-25 16:43:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:20,558 INFO L93 Difference]: Finished difference Result 39389 states and 43927 transitions. [2022-11-25 16:43:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 358 [2022-11-25 16:43:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:20,587 INFO L225 Difference]: With dead ends: 39389 [2022-11-25 16:43:20,587 INFO L226 Difference]: Without dead ends: 20156 [2022-11-25 16:43:20,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:20,599 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 91 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:20,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 170 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:43:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2022-11-25 16:43:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 17753. [2022-11-25 16:43:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17753 states, 17752 states have (on average 1.1128323569175305) internal successors, (19755), 17752 states have internal predecessors, (19755), 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) [2022-11-25 16:43:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17753 states to 17753 states and 19755 transitions. [2022-11-25 16:43:20,860 INFO L78 Accepts]: Start accepts. Automaton has 17753 states and 19755 transitions. Word has length 358 [2022-11-25 16:43:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:20,861 INFO L495 AbstractCegarLoop]: Abstraction has 17753 states and 19755 transitions. [2022-11-25 16:43:20,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-25 16:43:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 17753 states and 19755 transitions. [2022-11-25 16:43:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-25 16:43:20,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:20,877 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:20,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:21,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:43:21,089 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash -93934851, now seen corresponding path program 1 times [2022-11-25 16:43:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:21,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573662803] [2022-11-25 16:43:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 267 proven. 78 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-25 16:43:22,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573662803] [2022-11-25 16:43:22,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573662803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698135199] [2022-11-25 16:43:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:22,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:22,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:22,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:43:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 16:43:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-11-25 16:43:23,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-11-25 16:43:23,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698135199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:23,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:23,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-11-25 16:43:23,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664415962] [2022-11-25 16:43:23,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:23,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:43:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:43:23,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:43:23,937 INFO L87 Difference]: Start difference. First operand 17753 states and 19755 transitions. Second operand has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 8 states have internal predecessors, (503), 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) [2022-11-25 16:43:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:29,315 INFO L93 Difference]: Finished difference Result 46952 states and 52194 transitions. [2022-11-25 16:43:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 16:43:29,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 8 states have internal predecessors, (503), 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 375 [2022-11-25 16:43:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:29,347 INFO L225 Difference]: With dead ends: 46952 [2022-11-25 16:43:29,348 INFO L226 Difference]: Without dead ends: 28833 [2022-11-25 16:43:29,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-11-25 16:43:29,358 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1480 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5249 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 5741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 5249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:29,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 218 Invalid, 5741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 5249 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-25 16:43:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28833 states. [2022-11-25 16:43:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28833 to 13879. [2022-11-25 16:43:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13879 states, 13878 states have (on average 1.1119757890185906) internal successors, (15432), 13878 states have internal predecessors, (15432), 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) [2022-11-25 16:43:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13879 states to 13879 states and 15432 transitions. [2022-11-25 16:43:29,640 INFO L78 Accepts]: Start accepts. Automaton has 13879 states and 15432 transitions. Word has length 375 [2022-11-25 16:43:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:29,640 INFO L495 AbstractCegarLoop]: Abstraction has 13879 states and 15432 transitions. [2022-11-25 16:43:29,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 8 states have internal predecessors, (503), 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) [2022-11-25 16:43:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 13879 states and 15432 transitions. [2022-11-25 16:43:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-25 16:43:29,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:29,650 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 16:43:29,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:29,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 16:43:29,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:29,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1257108569, now seen corresponding path program 1 times [2022-11-25 16:43:29,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:29,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713866651] [2022-11-25 16:43:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:29,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 143 proven. 202 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-25 16:43:30,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713866651] [2022-11-25 16:43:30,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713866651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816942805] [2022-11-25 16:43:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:30,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:30,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:30,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:30,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:43:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:43:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-25 16:43:30,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:30,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816942805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:30,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:30,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-25 16:43:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014269546] [2022-11-25 16:43:30,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:30,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:43:30,976 INFO L87 Difference]: Start difference. First operand 13879 states and 15432 transitions. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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) [2022-11-25 16:43:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:32,493 INFO L93 Difference]: Finished difference Result 28868 states and 32094 transitions. [2022-11-25 16:43:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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 381 [2022-11-25 16:43:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:32,508 INFO L225 Difference]: With dead ends: 28868 [2022-11-25 16:43:32,508 INFO L226 Difference]: Without dead ends: 15359 [2022-11-25 16:43:32,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:43:32,516 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 221 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:32,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 112 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 16:43:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15359 states. [2022-11-25 16:43:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15359 to 14249. [2022-11-25 16:43:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14249 states, 14248 states have (on average 1.1099803481190342) internal successors, (15815), 14248 states have internal predecessors, (15815), 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) [2022-11-25 16:43:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14249 states to 14249 states and 15815 transitions. [2022-11-25 16:43:32,734 INFO L78 Accepts]: Start accepts. Automaton has 14249 states and 15815 transitions. Word has length 381 [2022-11-25 16:43:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:32,735 INFO L495 AbstractCegarLoop]: Abstraction has 14249 states and 15815 transitions. [2022-11-25 16:43:32,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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) [2022-11-25 16:43:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14249 states and 15815 transitions. [2022-11-25 16:43:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-11-25 16:43:32,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:32,744 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 16:43:32,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 16:43:32,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 16:43:32,950 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:32,951 INFO L85 PathProgramCache]: Analyzing trace with hash 431909693, now seen corresponding path program 1 times [2022-11-25 16:43:32,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:32,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116606725] [2022-11-25 16:43:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:32,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 143 proven. 211 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-25 16:43:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:33,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116606725] [2022-11-25 16:43:33,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116606725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:33,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320553473] [2022-11-25 16:43:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:33,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:33,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:33,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:33,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:43:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:43:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-25 16:43:34,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:34,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320553473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:34,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:34,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-25 16:43:34,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156049935] [2022-11-25 16:43:34,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:34,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:34,233 INFO L87 Difference]: Start difference. First operand 14249 states and 15815 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-11-25 16:43:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:35,150 INFO L93 Difference]: Finished difference Result 32211 states and 35917 transitions. [2022-11-25 16:43:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 395 [2022-11-25 16:43:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:35,171 INFO L225 Difference]: With dead ends: 32211 [2022-11-25 16:43:35,171 INFO L226 Difference]: Without dead ends: 18332 [2022-11-25 16:43:35,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:43:35,180 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 104 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:35,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 321 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:43:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18332 states. [2022-11-25 16:43:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18332 to 17586. [2022-11-25 16:43:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17586 states, 17585 states have (on average 1.1144725618424793) internal successors, (19598), 17585 states have internal predecessors, (19598), 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) [2022-11-25 16:43:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17586 states to 17586 states and 19598 transitions. [2022-11-25 16:43:35,403 INFO L78 Accepts]: Start accepts. Automaton has 17586 states and 19598 transitions. Word has length 395 [2022-11-25 16:43:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:35,404 INFO L495 AbstractCegarLoop]: Abstraction has 17586 states and 19598 transitions. [2022-11-25 16:43:35,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-11-25 16:43:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 17586 states and 19598 transitions. [2022-11-25 16:43:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-25 16:43:35,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:35,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:35,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:35,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:35,618 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1465243018, now seen corresponding path program 1 times [2022-11-25 16:43:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685627608] [2022-11-25 16:43:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-25 16:43:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685627608] [2022-11-25 16:43:36,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685627608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:36,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:36,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682710928] [2022-11-25 16:43:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:36,065 INFO L87 Difference]: Start difference. First operand 17586 states and 19598 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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) [2022-11-25 16:43:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:37,398 INFO L93 Difference]: Finished difference Result 40697 states and 45251 transitions. [2022-11-25 16:43:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:37,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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 414 [2022-11-25 16:43:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:37,417 INFO L225 Difference]: With dead ends: 40697 [2022-11-25 16:43:37,417 INFO L226 Difference]: Without dead ends: 23481 [2022-11-25 16:43:37,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:37,425 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 197 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:37,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 68 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 16:43:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23481 states. [2022-11-25 16:43:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23481 to 22188. [2022-11-25 16:43:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22188 states, 22187 states have (on average 1.1116870239329337) internal successors, (24665), 22187 states have internal predecessors, (24665), 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) [2022-11-25 16:43:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22188 states to 22188 states and 24665 transitions. [2022-11-25 16:43:37,661 INFO L78 Accepts]: Start accepts. Automaton has 22188 states and 24665 transitions. Word has length 414 [2022-11-25 16:43:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:37,661 INFO L495 AbstractCegarLoop]: Abstraction has 22188 states and 24665 transitions. [2022-11-25 16:43:37,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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) [2022-11-25 16:43:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 22188 states and 24665 transitions. [2022-11-25 16:43:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-11-25 16:43:37,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:37,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 16:43:37,670 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1627853402, now seen corresponding path program 1 times [2022-11-25 16:43:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:37,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341720359] [2022-11-25 16:43:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:37,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 143 proven. 229 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-25 16:43:38,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:38,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341720359] [2022-11-25 16:43:38,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341720359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:38,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308231853] [2022-11-25 16:43:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:38,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:38,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:38,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:38,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:43:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 16:43:38,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 248 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:40,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 248 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308231853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:44,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:44,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-11-25 16:43:44,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331604082] [2022-11-25 16:43:44,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:44,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:43:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:43:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:43:44,021 INFO L87 Difference]: Start difference. First operand 22188 states and 24665 transitions. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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) [2022-11-25 16:43:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:52,598 INFO L93 Difference]: Finished difference Result 59594 states and 65952 transitions. [2022-11-25 16:43:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 16:43:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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 417 [2022-11-25 16:43:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:52,638 INFO L225 Difference]: With dead ends: 59594 [2022-11-25 16:43:52,638 INFO L226 Difference]: Without dead ends: 37408 [2022-11-25 16:43:52,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 16:43:52,652 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 3790 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 5984 mSolverCounterSat, 1109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3790 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 7093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1109 IncrementalHoareTripleChecker+Valid, 5984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:52,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3790 Valid, 163 Invalid, 7093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1109 Valid, 5984 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-25 16:43:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37408 states. [2022-11-25 16:43:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37408 to 24197. [2022-11-25 16:43:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 1.0857993056703588) internal successors, (26272), 24196 states have internal predecessors, (26272), 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) [2022-11-25 16:43:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 26272 transitions. [2022-11-25 16:43:53,089 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 26272 transitions. Word has length 417 [2022-11-25 16:43:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:53,089 INFO L495 AbstractCegarLoop]: Abstraction has 24197 states and 26272 transitions. [2022-11-25 16:43:53,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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) [2022-11-25 16:43:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 26272 transitions. [2022-11-25 16:43:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-25 16:43:53,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:53,099 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:53,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:53,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:53,300 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1101386183, now seen corresponding path program 1 times [2022-11-25 16:43:53,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:53,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281935631] [2022-11-25 16:43:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:53,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-25 16:43:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:53,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281935631] [2022-11-25 16:43:53,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281935631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:53,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:53,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096511192] [2022-11-25 16:43:53,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:53,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:53,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:53,826 INFO L87 Difference]: Start difference. First operand 24197 states and 26272 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2022-11-25 16:43:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:54,820 INFO L93 Difference]: Finished difference Result 47669 states and 51805 transitions. [2022-11-25 16:43:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 511 [2022-11-25 16:43:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:54,849 INFO L225 Difference]: With dead ends: 47669 [2022-11-25 16:43:54,849 INFO L226 Difference]: Without dead ends: 25316 [2022-11-25 16:43:54,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:54,860 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 66 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:54,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 158 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:43:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25316 states. [2022-11-25 16:43:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25316 to 23451. [2022-11-25 16:43:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 1.0833262260127932) internal successors, (25404), 23450 states have internal predecessors, (25404), 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) [2022-11-25 16:43:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 25404 transitions. [2022-11-25 16:43:55,212 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 25404 transitions. Word has length 511 [2022-11-25 16:43:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:55,213 INFO L495 AbstractCegarLoop]: Abstraction has 23451 states and 25404 transitions. [2022-11-25 16:43:55,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2022-11-25 16:43:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 25404 transitions. [2022-11-25 16:43:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-11-25 16:43:55,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:55,222 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 16:43:55,222 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1677270036, now seen corresponding path program 1 times [2022-11-25 16:43:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:55,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899102936] [2022-11-25 16:43:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 514 proven. 3 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-25 16:43:55,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:55,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899102936] [2022-11-25 16:43:55,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899102936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:55,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340534604] [2022-11-25 16:43:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:55,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:55,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:55,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:56,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:43:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:43:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-25 16:43:56,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:56,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340534604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:56,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:56,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-25 16:43:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985090711] [2022-11-25 16:43:56,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:56,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:56,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:56,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:43:56,745 INFO L87 Difference]: Start difference. First operand 23451 states and 25404 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2022-11-25 16:43:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:58,032 INFO L93 Difference]: Finished difference Result 47443 states and 51428 transitions. [2022-11-25 16:43:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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 512 [2022-11-25 16:43:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:58,052 INFO L225 Difference]: With dead ends: 47443 [2022-11-25 16:43:58,053 INFO L226 Difference]: Without dead ends: 24178 [2022-11-25 16:43:58,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:43:58,062 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 259 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:58,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 140 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24178 states. [2022-11-25 16:43:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24178 to 22149. [2022-11-25 16:43:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22149 states, 22148 states have (on average 1.0789236048401663) internal successors, (23896), 22148 states have internal predecessors, (23896), 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) [2022-11-25 16:43:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22149 states to 22149 states and 23896 transitions. [2022-11-25 16:43:58,337 INFO L78 Accepts]: Start accepts. Automaton has 22149 states and 23896 transitions. Word has length 512 [2022-11-25 16:43:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:58,337 INFO L495 AbstractCegarLoop]: Abstraction has 22149 states and 23896 transitions. [2022-11-25 16:43:58,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2022-11-25 16:43:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 22149 states and 23896 transitions. [2022-11-25 16:43:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-11-25 16:43:58,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:58,348 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:58,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:58,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:58,549 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1808437552, now seen corresponding path program 1 times [2022-11-25 16:43:58,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:58,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878149002] [2022-11-25 16:43:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 609 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878149002] [2022-11-25 16:44:00,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878149002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857289938] [2022-11-25 16:44:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:00,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:00,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:00,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:44:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:44:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 696 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-25 16:44:01,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:44:01,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857289938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:01,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:44:01,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-11-25 16:44:01,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870355212] [2022-11-25 16:44:01,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:44:01,135 INFO L87 Difference]: Start difference. First operand 22149 states and 23896 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2022-11-25 16:44:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:02,079 INFO L93 Difference]: Finished difference Result 44489 states and 47969 transitions. [2022-11-25 16:44:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 539 [2022-11-25 16:44:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:02,107 INFO L225 Difference]: With dead ends: 44489 [2022-11-25 16:44:02,107 INFO L226 Difference]: Without dead ends: 24184 [2022-11-25 16:44:02,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:44:02,117 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 91 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:02,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 338 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:44:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24184 states. [2022-11-25 16:44:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24184 to 21781. [2022-11-25 16:44:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21781 states, 21780 states have (on average 1.0793388429752067) internal successors, (23508), 21780 states have internal predecessors, (23508), 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) [2022-11-25 16:44:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21781 states to 21781 states and 23508 transitions. [2022-11-25 16:44:02,371 INFO L78 Accepts]: Start accepts. Automaton has 21781 states and 23508 transitions. Word has length 539 [2022-11-25 16:44:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:02,372 INFO L495 AbstractCegarLoop]: Abstraction has 21781 states and 23508 transitions. [2022-11-25 16:44:02,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2022-11-25 16:44:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 21781 states and 23508 transitions. [2022-11-25 16:44:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-11-25 16:44:02,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:02,390 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:02,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:02,596 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash 27903080, now seen corresponding path program 1 times [2022-11-25 16:44:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:02,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519617946] [2022-11-25 16:44:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 191 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-11-25 16:44:03,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519617946] [2022-11-25 16:44:03,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519617946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019707243] [2022-11-25 16:44:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:03,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:03,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:03,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:44:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 16:44:03,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 241 proven. 454 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-25 16:44:04,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 191 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-11-25 16:44:06,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019707243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:06,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:06,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-11-25 16:44:06,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717860178] [2022-11-25 16:44:06,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:06,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:44:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:44:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:44:06,841 INFO L87 Difference]: Start difference. First operand 21781 states and 23508 transitions. Second operand has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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) [2022-11-25 16:44:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:10,739 INFO L93 Difference]: Finished difference Result 39484 states and 42402 transitions. [2022-11-25 16:44:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:44:10,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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 572 [2022-11-25 16:44:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:10,771 INFO L225 Difference]: With dead ends: 39484 [2022-11-25 16:44:10,772 INFO L226 Difference]: Without dead ends: 39482 [2022-11-25 16:44:10,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:44:10,779 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 736 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 4160 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 4511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 4160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:10,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 174 Invalid, 4511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 4160 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 16:44:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39482 states. [2022-11-25 16:44:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39482 to 14037. [2022-11-25 16:44:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14037 states, 14036 states have (on average 1.0807922485038473) internal successors, (15170), 14036 states have internal predecessors, (15170), 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) [2022-11-25 16:44:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 15170 transitions. [2022-11-25 16:44:11,118 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 15170 transitions. Word has length 572 [2022-11-25 16:44:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:11,119 INFO L495 AbstractCegarLoop]: Abstraction has 14037 states and 15170 transitions. [2022-11-25 16:44:11,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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) [2022-11-25 16:44:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 15170 transitions. [2022-11-25 16:44:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-11-25 16:44:11,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:11,131 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:11,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:11,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 16:44:11,336 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1930042227, now seen corresponding path program 1 times [2022-11-25 16:44:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:11,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129911044] [2022-11-25 16:44:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:11,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 902 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-25 16:44:11,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:11,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129911044] [2022-11-25 16:44:11,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129911044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:11,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:11,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019325174] [2022-11-25 16:44:11,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:11,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:11,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:11,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:11,876 INFO L87 Difference]: Start difference. First operand 14037 states and 15170 transitions. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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) [2022-11-25 16:44:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:13,222 INFO L93 Difference]: Finished difference Result 31214 states and 33634 transitions. [2022-11-25 16:44:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:44:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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 586 [2022-11-25 16:44:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:13,234 INFO L225 Difference]: With dead ends: 31214 [2022-11-25 16:44:13,234 INFO L226 Difference]: Without dead ends: 16441 [2022-11-25 16:44:13,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:13,240 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 198 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:13,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 63 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 16:44:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16441 states. [2022-11-25 16:44:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16441 to 14221. [2022-11-25 16:44:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14221 states, 14220 states have (on average 1.0791139240506329) internal successors, (15345), 14220 states have internal predecessors, (15345), 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) [2022-11-25 16:44:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14221 states to 14221 states and 15345 transitions. [2022-11-25 16:44:13,410 INFO L78 Accepts]: Start accepts. Automaton has 14221 states and 15345 transitions. Word has length 586 [2022-11-25 16:44:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:13,410 INFO L495 AbstractCegarLoop]: Abstraction has 14221 states and 15345 transitions. [2022-11-25 16:44:13,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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) [2022-11-25 16:44:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14221 states and 15345 transitions. [2022-11-25 16:44:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2022-11-25 16:44:13,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:13,451 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:13,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 16:44:13,451 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1100874474, now seen corresponding path program 1 times [2022-11-25 16:44:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:13,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399164733] [2022-11-25 16:44:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 890 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-11-25 16:44:14,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:14,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399164733] [2022-11-25 16:44:14,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399164733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:14,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:14,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338562188] [2022-11-25 16:44:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:14,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:14,325 INFO L87 Difference]: Start difference. First operand 14221 states and 15345 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2022-11-25 16:44:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:15,252 INFO L93 Difference]: Finished difference Result 28994 states and 31152 transitions. [2022-11-25 16:44:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 704 [2022-11-25 16:44:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:15,264 INFO L225 Difference]: With dead ends: 28994 [2022-11-25 16:44:15,264 INFO L226 Difference]: Without dead ends: 14775 [2022-11-25 16:44:15,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:15,270 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 123 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:15,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 63 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:44:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2022-11-25 16:44:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 12747. [2022-11-25 16:44:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12747 states, 12746 states have (on average 1.0731994351168994) internal successors, (13679), 12746 states have internal predecessors, (13679), 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) [2022-11-25 16:44:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12747 states to 12747 states and 13679 transitions. [2022-11-25 16:44:15,428 INFO L78 Accepts]: Start accepts. Automaton has 12747 states and 13679 transitions. Word has length 704 [2022-11-25 16:44:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:15,429 INFO L495 AbstractCegarLoop]: Abstraction has 12747 states and 13679 transitions. [2022-11-25 16:44:15,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2022-11-25 16:44:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 12747 states and 13679 transitions. [2022-11-25 16:44:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2022-11-25 16:44:15,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:15,439 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:15,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 16:44:15,439 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1575602108, now seen corresponding path program 1 times [2022-11-25 16:44:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:15,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786040298] [2022-11-25 16:44:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:15,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 1539 proven. 237 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2022-11-25 16:44:16,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786040298] [2022-11-25 16:44:16,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786040298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603854628] [2022-11-25 16:44:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:16,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:16,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:16,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:16,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:44:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:44:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 1632 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2022-11-25 16:44:17,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:44:17,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603854628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:17,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:44:17,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-25 16:44:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063688909] [2022-11-25 16:44:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:44:17,164 INFO L87 Difference]: Start difference. First operand 12747 states and 13679 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-25 16:44:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:18,052 INFO L93 Difference]: Finished difference Result 25495 states and 27359 transitions. [2022-11-25 16:44:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 801 [2022-11-25 16:44:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:18,062 INFO L225 Difference]: With dead ends: 25495 [2022-11-25 16:44:18,062 INFO L226 Difference]: Without dead ends: 12750 [2022-11-25 16:44:18,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:44:18,068 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:18,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 320 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:44:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12750 states. [2022-11-25 16:44:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12750 to 12747. [2022-11-25 16:44:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12747 states, 12746 states have (on average 1.0620586850776714) internal successors, (13537), 12746 states have internal predecessors, (13537), 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) [2022-11-25 16:44:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12747 states to 12747 states and 13537 transitions. [2022-11-25 16:44:18,218 INFO L78 Accepts]: Start accepts. Automaton has 12747 states and 13537 transitions. Word has length 801 [2022-11-25 16:44:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:18,218 INFO L495 AbstractCegarLoop]: Abstraction has 12747 states and 13537 transitions. [2022-11-25 16:44:18,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-25 16:44:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 12747 states and 13537 transitions. [2022-11-25 16:44:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-11-25 16:44:18,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:18,229 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:18,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:18,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 16:44:18,429 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:18,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1565644488, now seen corresponding path program 1 times [2022-11-25 16:44:18,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:18,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791372701] [2022-11-25 16:44:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:18,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 1314 proven. 73 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-11-25 16:44:19,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791372701] [2022-11-25 16:44:19,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791372701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288801876] [2022-11-25 16:44:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:19,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:19,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:19,699 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:19,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:44:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 16:44:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 975 proven. 496 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-11-25 16:44:22,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 975 proven. 496 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-11-25 16:44:25,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288801876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:25,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:25,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2022-11-25 16:44:25,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571613481] [2022-11-25 16:44:25,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:25,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:44:25,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:44:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:44:25,956 INFO L87 Difference]: Start difference. First operand 12747 states and 13537 transitions. Second operand has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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) [2022-11-25 16:44:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:33,839 INFO L93 Difference]: Finished difference Result 32910 states and 34907 transitions. [2022-11-25 16:44:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 16:44:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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 835 [2022-11-25 16:44:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:33,852 INFO L225 Difference]: With dead ends: 32910 [2022-11-25 16:44:33,852 INFO L226 Difference]: Without dead ends: 20165 [2022-11-25 16:44:33,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1725 GetRequests, 1686 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1191, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 16:44:33,857 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 4737 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 7861 mSolverCounterSat, 1095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 8956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1095 IncrementalHoareTripleChecker+Valid, 7861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:33,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4737 Valid, 196 Invalid, 8956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1095 Valid, 7861 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-25 16:44:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20165 states. [2022-11-25 16:44:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20165 to 9605. [2022-11-25 16:44:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 1.0599750104123282) internal successors, (10180), 9604 states have internal predecessors, (10180), 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) [2022-11-25 16:44:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 10180 transitions. [2022-11-25 16:44:34,008 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 10180 transitions. Word has length 835 [2022-11-25 16:44:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:34,009 INFO L495 AbstractCegarLoop]: Abstraction has 9605 states and 10180 transitions. [2022-11-25 16:44:34,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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) [2022-11-25 16:44:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 10180 transitions. [2022-11-25 16:44:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2022-11-25 16:44:34,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:34,020 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:34,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:34,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063dff79-6c28-487e-ab26-021763d42ee4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 16:44:34,226 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1907753503, now seen corresponding path program 1 times [2022-11-25 16:44:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:34,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92198309] [2022-11-25 16:44:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 1638 proven. 0 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2022-11-25 16:44:35,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:35,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92198309] [2022-11-25 16:44:35,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92198309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:35,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:35,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414138359] [2022-11-25 16:44:35,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:35,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:35,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:35,079 INFO L87 Difference]: Start difference. First operand 9605 states and 10180 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-25 16:44:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:35,912 INFO L93 Difference]: Finished difference Result 19394 states and 20565 transitions. [2022-11-25 16:44:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 892 [2022-11-25 16:44:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:35,922 INFO L225 Difference]: With dead ends: 19394 [2022-11-25 16:44:35,923 INFO L226 Difference]: Without dead ends: 10343 [2022-11-25 16:44:35,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:35,928 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 123 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:35,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 122 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:44:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10343 states. [2022-11-25 16:44:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10343 to 9605. [2022-11-25 16:44:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 1.059454394002499) internal successors, (10175), 9604 states have internal predecessors, (10175), 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) [2022-11-25 16:44:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 10175 transitions. [2022-11-25 16:44:36,051 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 10175 transitions. Word has length 892 [2022-11-25 16:44:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:36,052 INFO L495 AbstractCegarLoop]: Abstraction has 9605 states and 10175 transitions. [2022-11-25 16:44:36,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-25 16:44:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 10175 transitions. [2022-11-25 16:44:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-11-25 16:44:36,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:36,061 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:36,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 16:44:36,061 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1710428929, now seen corresponding path program 1 times [2022-11-25 16:44:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176506765] [2022-11-25 16:44:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 2039 proven. 0 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2022-11-25 16:44:36,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176506765] [2022-11-25 16:44:36,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176506765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:36,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:36,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275823978] [2022-11-25 16:44:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:36,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:36,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:36,429 INFO L87 Difference]: Start difference. First operand 9605 states and 10175 transitions. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2022-11-25 16:44:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:37,201 INFO L93 Difference]: Finished difference Result 19027 states and 20154 transitions. [2022-11-25 16:44:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 915 [2022-11-25 16:44:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:37,208 INFO L225 Difference]: With dead ends: 19027 [2022-11-25 16:44:37,208 INFO L226 Difference]: Without dead ends: 9792 [2022-11-25 16:44:37,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:37,213 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 112 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:37,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 335 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 16:44:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2022-11-25 16:44:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8685. [2022-11-25 16:44:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 1.0586135421464762) internal successors, (9193), 8684 states have internal predecessors, (9193), 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) [2022-11-25 16:44:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 9193 transitions. [2022-11-25 16:44:37,330 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 9193 transitions. Word has length 915 [2022-11-25 16:44:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:37,330 INFO L495 AbstractCegarLoop]: Abstraction has 8685 states and 9193 transitions. [2022-11-25 16:44:37,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2022-11-25 16:44:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 9193 transitions. [2022-11-25 16:44:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2022-11-25 16:44:37,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:37,342 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-25 16:44:37,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 16:44:37,342 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:37,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1236626021, now seen corresponding path program 1 times [2022-11-25 16:44:37,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:37,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353652487] [2022-11-25 16:44:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:37,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4128 backedges. 2832 proven. 0 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-25 16:44:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353652487] [2022-11-25 16:44:38,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353652487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:38,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:38,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:44:38,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35885601] [2022-11-25 16:44:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:38,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:38,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:38,396 INFO L87 Difference]: Start difference. First operand 8685 states and 9193 transitions. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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) [2022-11-25 16:44:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:39,689 INFO L93 Difference]: Finished difference Result 19766 states and 20952 transitions. [2022-11-25 16:44:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:44:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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 1067 [2022-11-25 16:44:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:39,698 INFO L225 Difference]: With dead ends: 19766 [2022-11-25 16:44:39,698 INFO L226 Difference]: Without dead ends: 11635 [2022-11-25 16:44:39,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:39,703 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 182 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:39,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 102 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 16:44:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11635 states. [2022-11-25 16:44:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11635 to 10529. [2022-11-25 16:44:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10529 states, 10528 states have (on average 1.059365501519757) internal successors, (11153), 10528 states have internal predecessors, (11153), 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) [2022-11-25 16:44:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10529 states to 10529 states and 11153 transitions. [2022-11-25 16:44:39,850 INFO L78 Accepts]: Start accepts. Automaton has 10529 states and 11153 transitions. Word has length 1067 [2022-11-25 16:44:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:39,851 INFO L495 AbstractCegarLoop]: Abstraction has 10529 states and 11153 transitions. [2022-11-25 16:44:39,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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) [2022-11-25 16:44:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 10529 states and 11153 transitions. [2022-11-25 16:44:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1075 [2022-11-25 16:44:39,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:39,863 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 16:44:39,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 16:44:39,864 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash -89935406, now seen corresponding path program 1 times [2022-11-25 16:44:39,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:39,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279292130] [2022-11-25 16:44:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:39,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 2489 proven. 0 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2022-11-25 16:44:40,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:40,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279292130] [2022-11-25 16:44:40,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279292130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:40,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:40,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:44:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092394237] [2022-11-25 16:44:40,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:40,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:40,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:40,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:40,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:40,928 INFO L87 Difference]: Start difference. First operand 10529 states and 11153 transitions. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 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) [2022-11-25 16:44:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:42,029 INFO L93 Difference]: Finished difference Result 17175 states and 18177 transitions. [2022-11-25 16:44:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:44:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 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 1074 [2022-11-25 16:44:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:42,030 INFO L225 Difference]: With dead ends: 17175 [2022-11-25 16:44:42,030 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 16:44:42,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:42,035 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 202 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:42,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 33 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:44:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 16:44:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 16:44:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-25 16:44:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 16:44:42,037 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1074 [2022-11-25 16:44:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:42,037 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 16:44:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 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) [2022-11-25 16:44:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 16:44:42,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 16:44:42,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 16:44:42,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 16:44:42,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.