./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ --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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- 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-dbf71c6-m [2022-10-17 10:16:05,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:16:05,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:16:05,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:16:05,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:16:05,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:16:05,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:16:05,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:16:05,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:16:05,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:16:05,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:16:05,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:16:05,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:16:05,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:16:05,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:16:05,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:16:05,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:16:05,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:16:05,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:16:05,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:16:05,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:16:05,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:16:05,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:16:05,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:16:05,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:16:05,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:16:05,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:16:05,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:16:05,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:16:05,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:16:05,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:16:05,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:16:05,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:16:05,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:16:05,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:16:05,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:16:05,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:16:05,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:16:05,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:16:05,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:16:05,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:16:05,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:16:05,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:16:05,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:16:05,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:16:05,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:16:05,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:16:05,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:16:05,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:16:05,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:16:05,609 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:16:05,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:16:05,610 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:16:05,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:16:05,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:16:05,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:16:05,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:16:05,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:16:05,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:16:05,611 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:16:05,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:16:05,612 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:16:05,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:16:05,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:16:05,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:16:05,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:16:05,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:16:05,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:16:05,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:16:05,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:16:05,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:16:05,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:16:05,623 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:16:05,623 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:16:05,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:16:05,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2022-10-17 10:16:05,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:16:05,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:16:05,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:16:05,915 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:16:05,916 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:16:05,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-10-17 10:16:05,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/data/7fcf94dc4/70dae0f0939e4fbc9b0ddf4e33701bec/FLAG5042a7166 [2022-10-17 10:16:06,796 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:16:06,797 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-10-17 10:16:06,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/data/7fcf94dc4/70dae0f0939e4fbc9b0ddf4e33701bec/FLAG5042a7166 [2022-10-17 10:16:06,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/data/7fcf94dc4/70dae0f0939e4fbc9b0ddf4e33701bec [2022-10-17 10:16:06,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:16:06,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:16:06,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:16:06,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:16:06,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:16:06,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:16:06" (1/1) ... [2022-10-17 10:16:06,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ae1c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:06, skipping insertion in model container [2022-10-17 10:16:06,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:16:06" (1/1) ... [2022-10-17 10:16:06,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:16:06,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:16:07,751 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2022-10-17 10:16:07,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:16:07,797 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:16:08,112 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2022-10-17 10:16:08,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:16:08,150 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:16:08,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08 WrapperNode [2022-10-17 10:16:08,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:16:08,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:16:08,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:16:08,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:16:08,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,353 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-10-17 10:16:08,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:16:08,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:16:08,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:16:08,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:16:08,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,504 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:16:08,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:16:08,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:16:08,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:16:08,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (1/1) ... [2022-10-17 10:16:08,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:16:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:08,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:16:08,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:16:08,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:16:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:16:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:16:08,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:16:08,807 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:16:08,810 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:16:11,262 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:16:11,286 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:16:11,286 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:16:11,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:16:11 BoogieIcfgContainer [2022-10-17 10:16:11,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:16:11,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:16:11,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:16:11,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:16:11,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:16:06" (1/3) ... [2022-10-17 10:16:11,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d29ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:16:11, skipping insertion in model container [2022-10-17 10:16:11,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:16:08" (2/3) ... [2022-10-17 10:16:11,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d29ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:16:11, skipping insertion in model container [2022-10-17 10:16:11,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:16:11" (3/3) ... [2022-10-17 10:16:11,304 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2022-10-17 10:16:11,329 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:16:11,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:16:11,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:16:11,423 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;@6a083844, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:16:11,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:16:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-10-17 10:16:11,452 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:11,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:11,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 724714706, now seen corresponding path program 1 times [2022-10-17 10:16:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108516583] [2022-10-17 10:16:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:12,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108516583] [2022-10-17 10:16:12,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108516583] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:12,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:12,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:16:12,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949807237] [2022-10-17 10:16:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:12,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:12,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:12,905 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:14,357 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2022-10-17 10:16:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2022-10-17 10:16:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:14,376 INFO L225 Difference]: With dead ends: 836 [2022-10-17 10:16:14,376 INFO L226 Difference]: Without dead ends: 457 [2022-10-17 10:16:14,381 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 [2022-10-17 10:16:14,385 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 103 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:14,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 10:16:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-10-17 10:16:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-10-17 10:16:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2022-10-17 10:16:14,455 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 180 [2022-10-17 10:16:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:14,457 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2022-10-17 10:16:14,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:14,457 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2022-10-17 10:16:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-10-17 10:16:14,463 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:14,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:14,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:16:14,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash -586354594, now seen corresponding path program 1 times [2022-10-17 10:16:14,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:14,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456081277] [2022-10-17 10:16:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:14,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456081277] [2022-10-17 10:16:15,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456081277] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:15,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:15,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:16:15,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352962360] [2022-10-17 10:16:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:15,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:15,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:15,013 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:16,053 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2022-10-17 10:16:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2022-10-17 10:16:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:16,060 INFO L225 Difference]: With dead ends: 1340 [2022-10-17 10:16:16,060 INFO L226 Difference]: Without dead ends: 891 [2022-10-17 10:16:16,062 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 [2022-10-17 10:16:16,064 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:16,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:16:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-10-17 10:16:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-10-17 10:16:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2022-10-17 10:16:16,110 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 186 [2022-10-17 10:16:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:16,110 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2022-10-17 10:16:16,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2022-10-17 10:16:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-10-17 10:16:16,116 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:16,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:16:16,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1559504468, now seen corresponding path program 1 times [2022-10-17 10:16:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:16,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974366785] [2022-10-17 10:16:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:16,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:16,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974366785] [2022-10-17 10:16:16,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974366785] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:16,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:16,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:16:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925535667] [2022-10-17 10:16:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:16,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:16,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:16,524 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:17,489 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2022-10-17 10:16:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-10-17 10:16:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:17,502 INFO L225 Difference]: With dead ends: 2605 [2022-10-17 10:16:17,502 INFO L226 Difference]: Without dead ends: 1721 [2022-10-17 10:16:17,504 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 [2022-10-17 10:16:17,506 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 232 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:17,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 126 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 10:16:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-10-17 10:16:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-10-17 10:16:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5005820721769498) internal successors, (2578), 1718 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2578 transitions. [2022-10-17 10:16:17,558 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2578 transitions. Word has length 190 [2022-10-17 10:16:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:17,558 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2578 transitions. [2022-10-17 10:16:17,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2578 transitions. [2022-10-17 10:16:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-10-17 10:16:17,565 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:17,566 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:17,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:16:17,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1196520631, now seen corresponding path program 1 times [2022-10-17 10:16:17,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:17,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292288289] [2022-10-17 10:16:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:17,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292288289] [2022-10-17 10:16:17,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292288289] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:17,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:17,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:16:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366151244] [2022-10-17 10:16:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:17,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:17,789 INFO L87 Difference]: Start difference. First operand 1719 states and 2578 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:18,839 INFO L93 Difference]: Finished difference Result 5080 states and 7623 transitions. [2022-10-17 10:16:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:18,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2022-10-17 10:16:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:18,858 INFO L225 Difference]: With dead ends: 5080 [2022-10-17 10:16:18,858 INFO L226 Difference]: Without dead ends: 3363 [2022-10-17 10:16:18,861 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 [2022-10-17 10:16:18,862 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 254 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:18,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 179 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:16:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-10-17 10:16:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3361. [2022-10-17 10:16:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.4321428571428572) internal successors, (4812), 3360 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4812 transitions. [2022-10-17 10:16:18,951 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4812 transitions. Word has length 193 [2022-10-17 10:16:18,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:18,951 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 4812 transitions. [2022-10-17 10:16:18,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4812 transitions. [2022-10-17 10:16:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-10-17 10:16:18,960 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:18,960 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:16:18,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1347155746, now seen corresponding path program 1 times [2022-10-17 10:16:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:18,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550933393] [2022-10-17 10:16:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:18,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550933393] [2022-10-17 10:16:19,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550933393] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:19,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:19,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:16:19,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933100342] [2022-10-17 10:16:19,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:19,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:19,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:19,199 INFO L87 Difference]: Start difference. First operand 3361 states and 4812 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:20,266 INFO L93 Difference]: Finished difference Result 9995 states and 14319 transitions. [2022-10-17 10:16:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-10-17 10:16:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:20,313 INFO L225 Difference]: With dead ends: 9995 [2022-10-17 10:16:20,314 INFO L226 Difference]: Without dead ends: 6636 [2022-10-17 10:16:20,320 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 [2022-10-17 10:16:20,323 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:20,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 173 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 10:16:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2022-10-17 10:16:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 6630. [2022-10-17 10:16:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6630 states, 6629 states have (on average 1.368381354653794) internal successors, (9071), 6629 states have internal predecessors, (9071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 9071 transitions. [2022-10-17 10:16:20,575 INFO L78 Accepts]: Start accepts. Automaton has 6630 states and 9071 transitions. Word has length 194 [2022-10-17 10:16:20,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:20,576 INFO L495 AbstractCegarLoop]: Abstraction has 6630 states and 9071 transitions. [2022-10-17 10:16:20,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6630 states and 9071 transitions. [2022-10-17 10:16:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-10-17 10:16:20,598 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:20,599 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:20,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:16:20,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:20,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash -130752193, now seen corresponding path program 1 times [2022-10-17 10:16:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:20,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676542226] [2022-10-17 10:16:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:21,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:21,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676542226] [2022-10-17 10:16:21,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676542226] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:21,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:16:21,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:16:21,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424343897] [2022-10-17 10:16:21,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:16:21,230 INFO L87 Difference]: Start difference. First operand 6630 states and 9071 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:22,295 INFO L93 Difference]: Finished difference Result 17747 states and 24321 transitions. [2022-10-17 10:16:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2022-10-17 10:16:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:22,364 INFO L225 Difference]: With dead ends: 17747 [2022-10-17 10:16:22,364 INFO L226 Difference]: Without dead ends: 11119 [2022-10-17 10:16:22,374 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 [2022-10-17 10:16:22,377 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:22,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 10:16:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-10-17 10:16:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 11096. [2022-10-17 10:16:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 11095 states have (on average 1.320865254619198) internal successors, (14655), 11095 states have internal predecessors, (14655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 14655 transitions. [2022-10-17 10:16:22,819 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 14655 transitions. Word has length 199 [2022-10-17 10:16:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:22,820 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 14655 transitions. [2022-10-17 10:16:22,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 14655 transitions. [2022-10-17 10:16:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-10-17 10:16:22,841 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:22,841 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:22,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:16:22,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:22,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1681277464, now seen corresponding path program 1 times [2022-10-17 10:16:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:22,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113175960] [2022-10-17 10:16:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:22,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113175960] [2022-10-17 10:16:23,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113175960] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261557435] [2022-10-17 10:16:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:23,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:23,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:23,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:23,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:16:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:23,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:16:23,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:16:23,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:16:23,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261557435] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:23,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:16:23,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 10:16:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901595257] [2022-10-17 10:16:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:16:23,726 INFO L87 Difference]: Start difference. First operand 11096 states and 14655 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:24,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:24,883 INFO L93 Difference]: Finished difference Result 29906 states and 39731 transitions. [2022-10-17 10:16:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 204 [2022-10-17 10:16:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:24,983 INFO L225 Difference]: With dead ends: 29906 [2022-10-17 10:16:24,984 INFO L226 Difference]: Without dead ends: 19015 [2022-10-17 10:16:24,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:16:24,997 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 230 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:24,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 413 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:16:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19015 states. [2022-10-17 10:16:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19015 to 19011. [2022-10-17 10:16:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19011 states, 19010 states have (on average 1.2027880063124672) internal successors, (22865), 19010 states have internal predecessors, (22865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19011 states to 19011 states and 22865 transitions. [2022-10-17 10:16:25,375 INFO L78 Accepts]: Start accepts. Automaton has 19011 states and 22865 transitions. Word has length 204 [2022-10-17 10:16:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:25,377 INFO L495 AbstractCegarLoop]: Abstraction has 19011 states and 22865 transitions. [2022-10-17 10:16:25,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 19011 states and 22865 transitions. [2022-10-17 10:16:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-10-17 10:16:25,404 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:25,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:25,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:25,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:25,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1944740812, now seen corresponding path program 1 times [2022-10-17 10:16:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:25,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212181504] [2022-10-17 10:16:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:26,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:26,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212181504] [2022-10-17 10:16:26,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212181504] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:26,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075105133] [2022-10-17 10:16:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:26,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:26,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:26,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:26,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:16:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:26,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:16:26,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:16:26,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:16:26,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075105133] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:26,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:16:26,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-10-17 10:16:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967527955] [2022-10-17 10:16:26,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:26,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:16:26,612 INFO L87 Difference]: Start difference. First operand 19011 states and 22865 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:27,763 INFO L93 Difference]: Finished difference Result 42894 states and 52535 transitions. [2022-10-17 10:16:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:27,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 206 [2022-10-17 10:16:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:27,812 INFO L225 Difference]: With dead ends: 42894 [2022-10-17 10:16:27,812 INFO L226 Difference]: Without dead ends: 24088 [2022-10-17 10:16:27,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:16:27,835 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 223 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:27,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:16:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24088 states. [2022-10-17 10:16:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24088 to 24084. [2022-10-17 10:16:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24084 states, 24083 states have (on average 1.1824523522816925) internal successors, (28477), 24083 states have internal predecessors, (28477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 28477 transitions. [2022-10-17 10:16:28,363 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 28477 transitions. Word has length 206 [2022-10-17 10:16:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:28,363 INFO L495 AbstractCegarLoop]: Abstraction has 24084 states and 28477 transitions. [2022-10-17 10:16:28,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 28477 transitions. [2022-10-17 10:16:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-10-17 10:16:28,403 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:28,403 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:28,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:28,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:16:28,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash 885807587, now seen corresponding path program 1 times [2022-10-17 10:16:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:28,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97942605] [2022-10-17 10:16:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:28,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:16:29,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:29,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97942605] [2022-10-17 10:16:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97942605] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017446120] [2022-10-17 10:16:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:29,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:29,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:16:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:16:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:16:29,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:16:29,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017446120] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:29,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:16:29,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-10-17 10:16:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339722717] [2022-10-17 10:16:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:29,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:29,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:16:29,647 INFO L87 Difference]: Start difference. First operand 24084 states and 28477 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:16:30,783 INFO L93 Difference]: Finished difference Result 58778 states and 70029 transitions. [2022-10-17 10:16:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:16:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 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 215 [2022-10-17 10:16:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:16:30,921 INFO L225 Difference]: With dead ends: 58778 [2022-10-17 10:16:30,921 INFO L226 Difference]: Without dead ends: 35102 [2022-10-17 10:16:30,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:16:30,958 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:16:30,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 181 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 10:16:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35102 states. [2022-10-17 10:16:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35102 to 35086. [2022-10-17 10:16:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35086 states, 35085 states have (on average 1.1760866467151205) internal successors, (41263), 35085 states have internal predecessors, (41263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35086 states to 35086 states and 41263 transitions. [2022-10-17 10:16:31,926 INFO L78 Accepts]: Start accepts. Automaton has 35086 states and 41263 transitions. Word has length 215 [2022-10-17 10:16:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:16:31,927 INFO L495 AbstractCegarLoop]: Abstraction has 35086 states and 41263 transitions. [2022-10-17 10:16:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:16:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 35086 states and 41263 transitions. [2022-10-17 10:16:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-10-17 10:16:31,972 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:16:31,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:16:32,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:16:32,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:16:32,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:16:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:16:32,199 INFO L85 PathProgramCache]: Analyzing trace with hash 382365, now seen corresponding path program 1 times [2022-10-17 10:16:32,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:16:32,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893505505] [2022-10-17 10:16:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:16:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:16:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:16:32,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893505505] [2022-10-17 10:16:32,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893505505] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:16:32,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561323995] [2022-10-17 10:16:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:16:32,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:16:32,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:16:32,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:16:32,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43faf1fb-0178-40c5-b578-a0f5cee42730/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:16:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:16:33,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:16:33,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:16:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:16:33,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:16:33,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561323995] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:16:33,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:16:33,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-10-17 10:16:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249059922] [2022-10-17 10:16:33,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:16:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:16:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:16:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:16:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:16:33,454 INFO L87 Difference]: Start difference. First operand 35086 states and 41263 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)