./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro --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 64bit --witnessprinter.graph.data.programhash 2e7da124f6dc4325f813b33115fd0b2c10cd5161497056d036260b1ab1f2897c --- 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-8393723 [2022-11-18 20:02:32,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:02:32,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:02:32,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:02:32,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:02:32,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:02:32,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:02:32,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:02:32,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:02:32,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:02:32,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:02:32,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:02:32,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:02:32,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:02:32,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:02:32,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:02:32,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:02:32,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:02:32,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:02:32,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:02:32,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:02:32,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:02:32,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:02:32,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:02:32,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:02:32,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:02:32,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:02:32,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:02:32,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:02:32,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:02:32,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:02:32,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:02:32,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:02:32,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:02:32,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:02:32,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:02:32,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:02:32,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:02:32,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:02:32,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:02:32,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:02:32,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:02:32,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:02:32,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:02:32,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:02:32,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:02:32,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:02:32,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:02:32,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:02:32,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:02:32,808 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:02:32,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:02:32,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:02:32,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:02:32,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:02:32,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:02:32,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:02:32,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:02:32,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:02:32,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:02:32,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:02:32,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:02:32,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:02:32,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:02:32,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:02:32,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:02:32,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:02:32,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:02:32,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:02:32,815 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:02:32,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:02:32,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:02:32,816 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_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e7da124f6dc4325f813b33115fd0b2c10cd5161497056d036260b1ab1f2897c [2022-11-18 20:02:33,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:02:33,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:02:33,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:02:33,180 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:02:33,181 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:02:33,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.2.prop1-back-serstep.c [2022-11-18 20:02:33,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/data/d848e34d1/4e11090d7e504ece8555e2a3b05e1379/FLAG9f7f6a60b [2022-11-18 20:02:34,024 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:02:34,026 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.2.prop1-back-serstep.c [2022-11-18 20:02:34,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/data/d848e34d1/4e11090d7e504ece8555e2a3b05e1379/FLAG9f7f6a60b [2022-11-18 20:02:34,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/data/d848e34d1/4e11090d7e504ece8555e2a3b05e1379 [2022-11-18 20:02:34,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:02:34,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:02:34,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:02:34,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:02:34,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:02:34,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:02:34" (1/1) ... [2022-11-18 20:02:34,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b2b6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:34, skipping insertion in model container [2022-11-18 20:02:34,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:02:34" (1/1) ... [2022-11-18 20:02:34,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:02:34,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:02:34,496 WARN L234 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_6296b853-83b5-45da-8925-6d0850dadd12/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:02:34,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:02:34,991 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:02:35,004 WARN L234 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_6296b853-83b5-45da-8925-6d0850dadd12/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:02:35,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:02:35,222 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:02:35,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35 WrapperNode [2022-11-18 20:02:35,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:02:35,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:02:35,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:02:35,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:02:35,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,515 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 4446 [2022-11-18 20:02:35,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:02:35,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:02:35,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:02:35,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:02:35,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:02:35,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:02:35,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:02:35,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:02:35,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (1/1) ... [2022-11-18 20:02:35,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:02:35,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:35,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:02:35,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:02:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:02:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:02:36,449 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:02:36,452 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:02:41,373 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:02:41,395 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:02:41,396 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:02:41,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:02:41 BoogieIcfgContainer [2022-11-18 20:02:41,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:02:41,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:02:41,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:02:41,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:02:41,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:02:34" (1/3) ... [2022-11-18 20:02:41,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7912f003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:02:41, skipping insertion in model container [2022-11-18 20:02:41,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:35" (2/3) ... [2022-11-18 20:02:41,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7912f003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:02:41, skipping insertion in model container [2022-11-18 20:02:41,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:02:41" (3/3) ... [2022-11-18 20:02:41,416 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp.2.prop1-back-serstep.c [2022-11-18 20:02:41,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:02:41,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:02:41,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:02:41,537 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;@17d0bb3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:02:41,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:02:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 770 states, 768 states have (on average 1.6640625) internal successors, (1278), 769 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-18 20:02:41,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:41,561 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] [2022-11-18 20:02:41,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:41,567 INFO L85 PathProgramCache]: Analyzing trace with hash -271768341, now seen corresponding path program 1 times [2022-11-18 20:02:41,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:41,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579793847] [2022-11-18 20:02:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:41,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:43,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:43,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579793847] [2022-11-18 20:02:43,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579793847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:43,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:43,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:02:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621356291] [2022-11-18 20:02:43,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:43,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:02:43,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:02:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:02:43,083 INFO L87 Difference]: Start difference. First operand has 770 states, 768 states have (on average 1.6640625) internal successors, (1278), 769 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:43,858 INFO L93 Difference]: Finished difference Result 2542 states and 4232 transitions. [2022-11-18 20:02:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:02:43,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2022-11-18 20:02:43,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:43,885 INFO L225 Difference]: With dead ends: 2542 [2022-11-18 20:02:43,885 INFO L226 Difference]: Without dead ends: 1774 [2022-11-18 20:02:43,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:02:43,895 INFO L413 NwaCegarLoop]: 1680 mSDtfsCounter, 3792 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3792 SdHoareTripleChecker+Valid, 3763 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:43,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3792 Valid, 3763 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:02:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2022-11-18 20:02:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 768. [2022-11-18 20:02:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.6610169491525424) internal successors, (1274), 767 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1274 transitions. [2022-11-18 20:02:43,979 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1274 transitions. Word has length 169 [2022-11-18 20:02:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:43,980 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1274 transitions. [2022-11-18 20:02:43,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1274 transitions. [2022-11-18 20:02:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-18 20:02:43,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:43,984 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] [2022-11-18 20:02:43,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:02:43,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 166901535, now seen corresponding path program 1 times [2022-11-18 20:02:43,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:43,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402781519] [2022-11-18 20:02:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:43,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:45,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:45,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402781519] [2022-11-18 20:02:45,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402781519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:45,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:45,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:02:45,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167811231] [2022-11-18 20:02:45,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:45,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:02:45,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:02:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:02:45,115 INFO L87 Difference]: Start difference. First operand 768 states and 1274 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:45,853 INFO L93 Difference]: Finished difference Result 3053 states and 5074 transitions. [2022-11-18 20:02:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:02:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2022-11-18 20:02:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:45,867 INFO L225 Difference]: With dead ends: 3053 [2022-11-18 20:02:45,867 INFO L226 Difference]: Without dead ends: 2287 [2022-11-18 20:02:45,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:02:45,877 INFO L413 NwaCegarLoop]: 1674 mSDtfsCounter, 3223 mSDsluCounter, 2533 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3223 SdHoareTripleChecker+Valid, 4207 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:45,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3223 Valid, 4207 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:02:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-11-18 20:02:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1013. [2022-11-18 20:02:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.6610671936758894) internal successors, (1681), 1012 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1681 transitions. [2022-11-18 20:02:45,939 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1681 transitions. Word has length 170 [2022-11-18 20:02:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:45,940 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1681 transitions. [2022-11-18 20:02:45,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:45,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1681 transitions. [2022-11-18 20:02:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2022-11-18 20:02:45,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:45,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:45,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:02:45,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:02:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1146713846, now seen corresponding path program 1 times [2022-11-18 20:02:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:45,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526845357] [2022-11-18 20:02:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-18 20:03:16,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:16,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526845357] [2022-11-18 20:03:16,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526845357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:03:16,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:03:16,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:03:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670756489] [2022-11-18 20:03:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:03:16,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:03:16,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:16,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:03:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:03:16,384 INFO L87 Difference]: Start difference. First operand 1013 states and 1681 transitions. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:17,239 INFO L93 Difference]: Finished difference Result 3299 states and 5480 transitions. [2022-11-18 20:03:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:03:17,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 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 679 [2022-11-18 20:03:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:17,250 INFO L225 Difference]: With dead ends: 3299 [2022-11-18 20:03:17,250 INFO L226 Difference]: Without dead ends: 2533 [2022-11-18 20:03:17,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:03:17,253 INFO L413 NwaCegarLoop]: 1674 mSDtfsCounter, 3782 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3782 SdHoareTripleChecker+Valid, 4603 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:17,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3782 Valid, 4603 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:03:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-11-18 20:03:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1013. [2022-11-18 20:03:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.6610671936758894) internal successors, (1681), 1012 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1681 transitions. [2022-11-18 20:03:17,286 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1681 transitions. Word has length 679 [2022-11-18 20:03:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:17,288 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1681 transitions. [2022-11-18 20:03:17,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1681 transitions. [2022-11-18 20:03:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-11-18 20:03:17,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:17,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:03:17,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:03:17,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1400609800, now seen corresponding path program 1 times [2022-11-18 20:03:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:03:17,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320267887] [2022-11-18 20:03:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:03:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:41,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:41,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320267887] [2022-11-18 20:03:41,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320267887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:41,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081475375] [2022-11-18 20:03:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:41,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:03:41,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:03:41,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:03:41,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:03:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 5527 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:03:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:47,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:56,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081475375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:56,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:03:56,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 16 [2022-11-18 20:03:56,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459030671] [2022-11-18 20:03:56,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:56,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:03:56,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:03:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:03:56,790 INFO L87 Difference]: Start difference. First operand 1013 states and 1681 transitions. Second operand has 16 states, 16 states have (on average 97.25) internal successors, (1556), 16 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:04:00,322 INFO L93 Difference]: Finished difference Result 8740 states and 14530 transitions. [2022-11-18 20:04:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:04:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 97.25) internal successors, (1556), 16 states have internal predecessors, (1556), 0 states have call successors, (0), 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 680 [2022-11-18 20:04:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:04:00,355 INFO L225 Difference]: With dead ends: 8740 [2022-11-18 20:04:00,355 INFO L226 Difference]: Without dead ends: 7972 [2022-11-18 20:04:00,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1379 GetRequests, 1349 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:04:00,361 INFO L413 NwaCegarLoop]: 1616 mSDtfsCounter, 49880 mSDsluCounter, 13684 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49880 SdHoareTripleChecker+Valid, 15300 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:04:00,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49880 Valid, 15300 Invalid, 711 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 20:04:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7972 states. [2022-11-18 20:04:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7972 to 2048. [2022-11-18 20:04:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:04:00,460 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 680 [2022-11-18 20:04:00,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:04:00,461 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:04:00,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 97.25) internal successors, (1556), 16 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:04:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2022-11-18 20:04:00,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:04:00,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:04:00,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:04:00,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:04:00,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:04:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:04:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1147356786, now seen corresponding path program 1 times [2022-11-18 20:04:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:04:00,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029485376] [2022-11-18 20:04:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:04:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:04:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:04:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:04:59,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:04:59,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029485376] [2022-11-18 20:04:59,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029485376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:04:59,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020187296] [2022-11-18 20:04:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:04:59,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:04:59,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:04:59,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:04:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:05:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:01,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 5530 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:05:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:05:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:03,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:05:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-18 20:05:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020187296] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:04,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:05:04,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 8] total 13 [2022-11-18 20:05:04,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535277804] [2022-11-18 20:05:04,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:04,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:05:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:05:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:05:04,993 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:05,471 INFO L93 Difference]: Finished difference Result 5355 states and 8887 transitions. [2022-11-18 20:05:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:05:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 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 681 [2022-11-18 20:05:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:05,486 INFO L225 Difference]: With dead ends: 5355 [2022-11-18 20:05:05,487 INFO L226 Difference]: Without dead ends: 4587 [2022-11-18 20:05:05,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1374 GetRequests, 1359 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:05:05,490 INFO L413 NwaCegarLoop]: 1672 mSDtfsCounter, 5050 mSDsluCounter, 4600 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5050 SdHoareTripleChecker+Valid, 6272 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:05,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5050 Valid, 6272 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:05:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2022-11-18 20:05:05,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 2048. [2022-11-18 20:05:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:05:05,556 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 681 [2022-11-18 20:05:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:05,557 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:05:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:05:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2022-11-18 20:05:05,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:05,566 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:05,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:05:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:05,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:05:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash 389798298, now seen corresponding path program 1 times [2022-11-18 20:05:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646605898] [2022-11-18 20:05:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646605898] [2022-11-18 20:06:04,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646605898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602558484] [2022-11-18 20:06:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:04,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:04,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:06:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 5533 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-18 20:06:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:08,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-18 20:06:11,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602558484] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:11,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:06:11,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 15 [2022-11-18 20:06:11,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069616287] [2022-11-18 20:06:11,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:06:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:06:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:06:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:06:11,314 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 6 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:12,164 INFO L93 Difference]: Finished difference Result 5382 states and 8932 transitions. [2022-11-18 20:06:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:06:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 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 682 [2022-11-18 20:06:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:12,185 INFO L225 Difference]: With dead ends: 5382 [2022-11-18 20:06:12,186 INFO L226 Difference]: Without dead ends: 4611 [2022-11-18 20:06:12,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1362 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:06:12,189 INFO L413 NwaCegarLoop]: 1670 mSDtfsCounter, 6327 mSDsluCounter, 6269 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6327 SdHoareTripleChecker+Valid, 7939 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:12,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6327 Valid, 7939 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:06:12,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2022-11-18 20:06:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 2048. [2022-11-18 20:06:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:06:12,253 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 682 [2022-11-18 20:06:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:12,254 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:06:12,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:06:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-11-18 20:06:12,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:12,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:12,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:12,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:06:12,489 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:06:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash 708869032, now seen corresponding path program 1 times [2022-11-18 20:06:12,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:12,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110137172] [2022-11-18 20:06:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:10,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110137172] [2022-11-18 20:07:10,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110137172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285775244] [2022-11-18 20:07:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:10,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:07:10,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:07:10,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:07:10,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:07:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:12,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 5536 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 20:07:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:14,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-18 20:07:17,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285775244] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:17,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:07:17,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 10] total 17 [2022-11-18 20:07:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268973545] [2022-11-18 20:07:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:07:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:07:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:07:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:07:17,538 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:18,625 INFO L93 Difference]: Finished difference Result 5409 states and 8977 transitions. [2022-11-18 20:07:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:07:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 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 683 [2022-11-18 20:07:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:18,636 INFO L225 Difference]: With dead ends: 5409 [2022-11-18 20:07:18,636 INFO L226 Difference]: Without dead ends: 4635 [2022-11-18 20:07:18,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1390 GetRequests, 1365 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:07:18,639 INFO L413 NwaCegarLoop]: 1668 mSDtfsCounter, 7609 mSDsluCounter, 7936 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7609 SdHoareTripleChecker+Valid, 9604 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:18,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7609 Valid, 9604 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:07:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2022-11-18 20:07:18,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 2048. [2022-11-18 20:07:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:07:18,704 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 683 [2022-11-18 20:07:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:18,705 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:07:18,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:07:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2022-11-18 20:07:18,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:18,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:18,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:18,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:07:18,927 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:07:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash 727849022, now seen corresponding path program 1 times [2022-11-18 20:07:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59328461] [2022-11-18 20:07:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:08:18,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:18,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59328461] [2022-11-18 20:08:18,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59328461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:18,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366705940] [2022-11-18 20:08:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:18,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:18,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:18,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:18,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:08:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 5539 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:08:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:08:22,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-18 20:08:24,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366705940] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:24,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:08:24,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 11] total 19 [2022-11-18 20:08:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869751270] [2022-11-18 20:08:24,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:08:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:08:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:08:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:08:24,045 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:24,992 INFO L93 Difference]: Finished difference Result 5436 states and 9022 transitions. [2022-11-18 20:08:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:08:24,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 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 684 [2022-11-18 20:08:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:25,002 INFO L225 Difference]: With dead ends: 5436 [2022-11-18 20:08:25,002 INFO L226 Difference]: Without dead ends: 4659 [2022-11-18 20:08:25,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1368 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:08:25,006 INFO L413 NwaCegarLoop]: 1666 mSDtfsCounter, 8896 mSDsluCounter, 9601 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8896 SdHoareTripleChecker+Valid, 11267 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:25,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8896 Valid, 11267 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:08:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4659 states. [2022-11-18 20:08:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4659 to 2048. [2022-11-18 20:08:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:08:25,068 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 684 [2022-11-18 20:08:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:25,069 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:08:25,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:08:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2022-11-18 20:08:25,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:25,077 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:25,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:25,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:25,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:08:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:25,291 INFO L85 PathProgramCache]: Analyzing trace with hash -611338368, now seen corresponding path program 1 times [2022-11-18 20:08:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:25,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717908605] [2022-11-18 20:08:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:12,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717908605] [2022-11-18 20:09:12,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717908605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:12,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299283605] [2022-11-18 20:09:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:12,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:12,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:12,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:12,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:09:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 5542 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-18 20:09:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:17,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-18 20:09:20,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299283605] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:20,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:09:20,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 12] total 21 [2022-11-18 20:09:20,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385131785] [2022-11-18 20:09:20,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:20,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:09:20,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:09:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:09:20,405 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 9 states, 9 states have (on average 59.44444444444444) internal successors, (535), 9 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:21,378 INFO L93 Difference]: Finished difference Result 5463 states and 9067 transitions. [2022-11-18 20:09:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:09:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 59.44444444444444) internal successors, (535), 9 states have internal predecessors, (535), 0 states have call successors, (0), 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 685 [2022-11-18 20:09:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:21,385 INFO L225 Difference]: With dead ends: 5463 [2022-11-18 20:09:21,386 INFO L226 Difference]: Without dead ends: 4683 [2022-11-18 20:09:21,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1406 GetRequests, 1371 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:09:21,389 INFO L413 NwaCegarLoop]: 1664 mSDtfsCounter, 10188 mSDsluCounter, 11264 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10188 SdHoareTripleChecker+Valid, 12928 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:21,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10188 Valid, 12928 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:09:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4683 states. [2022-11-18 20:09:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4683 to 2048. [2022-11-18 20:09:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:09:21,447 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 685 [2022-11-18 20:09:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:21,448 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:09:21,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 59.44444444444444) internal successors, (535), 9 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:09:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-11-18 20:09:21,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:21,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:21,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:09:21,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -432255708, now seen corresponding path program 1 times [2022-11-18 20:09:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460160336] [2022-11-18 20:09:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:12,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460160336] [2022-11-18 20:10:12,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460160336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653239994] [2022-11-18 20:10:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:12,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:12,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:12,317 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:12,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:10:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:14,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 5545 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-18 20:10:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:16,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-18 20:10:19,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653239994] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:19,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:10:19,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 13] total 23 [2022-11-18 20:10:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814837749] [2022-11-18 20:10:19,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:19,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:10:19,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:10:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:10:19,577 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:20,809 INFO L93 Difference]: Finished difference Result 5490 states and 9112 transitions. [2022-11-18 20:10:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:10:20,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 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 686 [2022-11-18 20:10:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:20,820 INFO L225 Difference]: With dead ends: 5490 [2022-11-18 20:10:20,820 INFO L226 Difference]: Without dead ends: 4707 [2022-11-18 20:10:20,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1414 GetRequests, 1374 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:10:20,824 INFO L413 NwaCegarLoop]: 1662 mSDtfsCounter, 11485 mSDsluCounter, 12925 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11485 SdHoareTripleChecker+Valid, 14587 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:20,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11485 Valid, 14587 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:10:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2022-11-18 20:10:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 2048. [2022-11-18 20:10:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:10:20,883 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 686 [2022-11-18 20:10:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:20,884 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:10:20,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:10:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-11-18 20:10:20,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:20,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:20,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:21,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:10:21,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash -988539494, now seen corresponding path program 1 times [2022-11-18 20:10:21,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:21,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227278421] [2022-11-18 20:10:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:21,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 70 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227278421] [2022-11-18 20:11:17,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227278421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743830445] [2022-11-18 20:11:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:17,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:17,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:11:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 5548 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-18 20:11:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-18 20:11:24,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743830445] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:24,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:11:24,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 14] total 25 [2022-11-18 20:11:24,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210166454] [2022-11-18 20:11:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:11:24,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:11:24,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:24,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:11:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:11:24,317 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 11 states, 11 states have (on average 49.18181818181818) internal successors, (541), 11 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:25,923 INFO L93 Difference]: Finished difference Result 5517 states and 9157 transitions. [2022-11-18 20:11:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:11:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 49.18181818181818) internal successors, (541), 11 states have internal predecessors, (541), 0 states have call successors, (0), 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 687 [2022-11-18 20:11:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:25,932 INFO L225 Difference]: With dead ends: 5517 [2022-11-18 20:11:25,932 INFO L226 Difference]: Without dead ends: 4731 [2022-11-18 20:11:25,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1423 GetRequests, 1378 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=1843, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:11:25,936 INFO L413 NwaCegarLoop]: 1660 mSDtfsCounter, 12787 mSDsluCounter, 14584 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12787 SdHoareTripleChecker+Valid, 16244 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:25,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12787 Valid, 16244 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:11:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2022-11-18 20:11:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 2048. [2022-11-18 20:11:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:11:25,994 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 687 [2022-11-18 20:11:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:25,995 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:11:25,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 49.18181818181818) internal successors, (541), 11 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:11:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-11-18 20:11:26,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:26,004 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:26,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:26,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:26,219 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:11:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 174006984, now seen corresponding path program 1 times [2022-11-18 20:11:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002844802] [2022-11-18 20:11:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:26,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:22,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:22,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002844802] [2022-11-18 20:12:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002844802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295165052] [2022-11-18 20:12:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:22,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:22,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:22,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:22,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:12:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:24,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 5551 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-18 20:12:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:26,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-18 20:12:28,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295165052] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:28,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:12:28,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 15] total 27 [2022-11-18 20:12:28,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825870252] [2022-11-18 20:12:28,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:12:28,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:12:28,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:28,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:12:28,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:12:28,919 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:30,758 INFO L93 Difference]: Finished difference Result 5544 states and 9202 transitions. [2022-11-18 20:12:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:12:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 0 states have call successors, (0), 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 688 [2022-11-18 20:12:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:30,766 INFO L225 Difference]: With dead ends: 5544 [2022-11-18 20:12:30,767 INFO L226 Difference]: Without dead ends: 4755 [2022-11-18 20:12:30,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1380 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:12:30,771 INFO L413 NwaCegarLoop]: 1658 mSDtfsCounter, 14094 mSDsluCounter, 16241 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14094 SdHoareTripleChecker+Valid, 17899 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:30,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14094 Valid, 17899 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:12:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2022-11-18 20:12:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2048. [2022-11-18 20:12:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:12:30,824 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 688 [2022-11-18 20:12:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:30,825 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:12:30,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:12:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2022-11-18 20:12:30,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:30,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:30,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:31,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:12:31,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:12:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:31,056 INFO L85 PathProgramCache]: Analyzing trace with hash 111444082, now seen corresponding path program 1 times [2022-11-18 20:12:31,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:31,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471093690] [2022-11-18 20:12:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:34,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:34,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471093690] [2022-11-18 20:13:34,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471093690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:34,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730105511] [2022-11-18 20:13:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:34,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:34,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:34,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:13:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 5554 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-18 20:13:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:39,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-18 20:13:42,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730105511] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:42,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:13:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 16] total 29 [2022-11-18 20:13:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126890837] [2022-11-18 20:13:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:42,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:13:42,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:13:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:13:42,777 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 13 states, 13 states have (on average 42.07692307692308) internal successors, (547), 13 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:44,982 INFO L93 Difference]: Finished difference Result 5571 states and 9247 transitions. [2022-11-18 20:13:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:13:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 42.07692307692308) internal successors, (547), 13 states have internal predecessors, (547), 0 states have call successors, (0), 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 689 [2022-11-18 20:13:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:44,989 INFO L225 Difference]: With dead ends: 5571 [2022-11-18 20:13:44,990 INFO L226 Difference]: Without dead ends: 4779 [2022-11-18 20:13:44,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 1383 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=466, Invalid=2726, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:13:44,994 INFO L413 NwaCegarLoop]: 1656 mSDtfsCounter, 15406 mSDsluCounter, 17896 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15406 SdHoareTripleChecker+Valid, 19552 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:44,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15406 Valid, 19552 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:13:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4779 states. [2022-11-18 20:13:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4779 to 2048. [2022-11-18 20:13:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:13:45,053 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 689 [2022-11-18 20:13:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:45,054 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:13:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.07692307692308) internal successors, (547), 13 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:13:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2022-11-18 20:13:45,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:45,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:45,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:45,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:45,291 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:45,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1310022574, now seen corresponding path program 1 times [2022-11-18 20:13:45,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:45,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977586099] [2022-11-18 20:13:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:45,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:14:46,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:46,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977586099] [2022-11-18 20:14:46,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977586099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:14:46,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245361687] [2022-11-18 20:14:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:46,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:46,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:46,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:46,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:14:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 5557 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-18 20:14:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:14:50,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:14:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-18 20:14:53,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245361687] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:14:53,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:14:53,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 17] total 31 [2022-11-18 20:14:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340728884] [2022-11-18 20:14:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:14:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:14:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:14:53,031 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 14 states, 14 states have (on average 39.285714285714285) internal successors, (550), 14 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:55,184 INFO L93 Difference]: Finished difference Result 5598 states and 9292 transitions. [2022-11-18 20:14:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:14:55,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 39.285714285714285) internal successors, (550), 14 states have internal predecessors, (550), 0 states have call successors, (0), 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 690 [2022-11-18 20:14:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:55,189 INFO L225 Difference]: With dead ends: 5598 [2022-11-18 20:14:55,189 INFO L226 Difference]: Without dead ends: 4803 [2022-11-18 20:14:55,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1386 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=550, Invalid=3232, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:14:55,192 INFO L413 NwaCegarLoop]: 1654 mSDtfsCounter, 16723 mSDsluCounter, 19549 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16723 SdHoareTripleChecker+Valid, 21203 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:55,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16723 Valid, 21203 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:14:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2022-11-18 20:14:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2048. [2022-11-18 20:14:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:14:55,235 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 690 [2022-11-18 20:14:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:55,236 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:14:55,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.285714285714285) internal successors, (550), 14 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:14:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2022-11-18 20:14:55,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:55,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:55,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:14:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:55,459 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash 558758540, now seen corresponding path program 1 times [2022-11-18 20:14:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:55,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444953513] [2022-11-18 20:14:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:15:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 74 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:15:57,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:15:57,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444953513] [2022-11-18 20:15:57,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444953513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:15:57,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751086013] [2022-11-18 20:15:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:15:57,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:57,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:15:57,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:15:57,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:15:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 5560 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-18 20:15:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:16:01,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:16:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-18 20:16:04,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751086013] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:04,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:16:04,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 18] total 33 [2022-11-18 20:16:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006941520] [2022-11-18 20:16:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:16:04,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:16:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:16:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:16:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:16:04,670 INFO L87 Difference]: Start difference. First operand 2048 states and 3398 transitions. Second operand has 15 states, 15 states have (on average 36.86666666666667) internal successors, (553), 15 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:07,462 INFO L93 Difference]: Finished difference Result 5625 states and 9337 transitions. [2022-11-18 20:16:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:16:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 36.86666666666667) internal successors, (553), 15 states have internal predecessors, (553), 0 states have call successors, (0), 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 691 [2022-11-18 20:16:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:07,467 INFO L225 Difference]: With dead ends: 5625 [2022-11-18 20:16:07,467 INFO L226 Difference]: Without dead ends: 4827 [2022-11-18 20:16:07,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1454 GetRequests, 1389 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=641, Invalid=3781, Unknown=0, NotChecked=0, Total=4422 [2022-11-18 20:16:07,472 INFO L413 NwaCegarLoop]: 1652 mSDtfsCounter, 18045 mSDsluCounter, 21200 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18045 SdHoareTripleChecker+Valid, 22852 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:07,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18045 Valid, 22852 Invalid, 234 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:16:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2022-11-18 20:16:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 2048. [2022-11-18 20:16:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 1.659990229604299) internal successors, (3398), 2047 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3398 transitions. [2022-11-18 20:16:07,511 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3398 transitions. Word has length 691 [2022-11-18 20:16:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:07,512 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3398 transitions. [2022-11-18 20:16:07,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 36.86666666666667) internal successors, (553), 15 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3398 transitions. [2022-11-18 20:16:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-11-18 20:16:07,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:07,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:07,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:07,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6296b853-83b5-45da-8925-6d0850dadd12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:07,735 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:16:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1284229202, now seen corresponding path program 1 times [2022-11-18 20:16:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:07,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071617232] [2022-11-18 20:16:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms