./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/watermelon.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:11:41,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:11:41,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:11:41,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:11:41,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:11:41,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:11:41,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:11:41,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:11:41,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:11:41,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:11:41,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:11:41,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:11:41,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:11:41,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:11:41,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:11:41,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:11:41,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:11:41,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:11:41,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:11:41,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:11:41,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:11:41,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:11:41,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:11:41,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:11:41,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:11:41,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:11:41,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:11:41,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:11:41,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:11:41,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:11:41,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:11:41,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:11:41,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:11:41,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:11:41,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:11:41,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:11:41,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:11:41,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:11:41,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:11:41,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:11:41,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:11:41,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:11:41,873 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:11:41,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:11:41,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:11:41,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:11:41,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:11:41,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:11:41,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:11:41,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:11:41,876 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:11:41,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:11:41,877 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:11:41,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:11:41,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:11:41,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:11:41,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:11:41,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:11:41,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:11:41,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:11:41,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:11:41,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:11:41,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:11:41,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:11:41,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:11:41,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:11:41,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:11:41,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:11:41,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:11:41,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:11:41,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:11:41,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:11:41,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:11:41,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:11:41,882 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:11:41,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:11:41,883 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2022-11-25 17:11:42,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:11:42,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:11:42,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:11:42,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:11:42,207 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:11:42,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/loops-crafted-1/watermelon.c [2022-11-25 17:11:45,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:11:45,416 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:11:45,417 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/sv-benchmarks/c/loops-crafted-1/watermelon.c [2022-11-25 17:11:45,423 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/data/17823abbb/6e087bb3457d427b9ad6298efeff5e02/FLAG90821b602 [2022-11-25 17:11:45,438 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/data/17823abbb/6e087bb3457d427b9ad6298efeff5e02 [2022-11-25 17:11:45,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:11:45,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:11:45,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:11:45,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:11:45,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:11:45,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e97ad94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45, skipping insertion in model container [2022-11-25 17:11:45,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:11:45,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:11:45,613 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2022-11-25 17:11:45,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:11:45,637 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:11:45,649 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2022-11-25 17:11:45,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:11:45,667 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:11:45,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45 WrapperNode [2022-11-25 17:11:45,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:11:45,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:11:45,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:11:45,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:11:45,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,701 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2022-11-25 17:11:45,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:11:45,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:11:45,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:11:45,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:11:45,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,721 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:11:45,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:11:45,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:11:45,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:11:45,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (1/1) ... [2022-11-25 17:11:45,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:11:45,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:45,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:11:45,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:11:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:11:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:11:45,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:11:45,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:11:45,906 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:11:45,908 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:11:46,121 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:11:46,128 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:11:46,128 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:11:46,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:11:46 BoogieIcfgContainer [2022-11-25 17:11:46,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:11:46,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:11:46,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:11:46,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:11:46,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:11:45" (1/3) ... [2022-11-25 17:11:46,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a53c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:11:46, skipping insertion in model container [2022-11-25 17:11:46,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:45" (2/3) ... [2022-11-25 17:11:46,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a53c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:11:46, skipping insertion in model container [2022-11-25 17:11:46,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:11:46" (3/3) ... [2022-11-25 17:11:46,142 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2022-11-25 17:11:46,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:11:46,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:11:46,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:11:46,274 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;@36c8b924, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:11:46,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:11:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:11:46,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:46,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:46,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2143149025, now seen corresponding path program 1 times [2022-11-25 17:11:46,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:46,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122485513] [2022-11-25 17:11:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:46,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:46,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122485513] [2022-11-25 17:11:46,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122485513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:46,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:46,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:11:46,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713746065] [2022-11-25 17:11:46,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:46,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:11:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:11:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:11:46,889 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 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 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:47,088 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-11-25 17:11:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:11:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-25 17:11:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:47,101 INFO L225 Difference]: With dead ends: 68 [2022-11-25 17:11:47,101 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 17:11:47,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:11:47,107 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:47,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 17:11:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-11-25 17:11:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-11-25 17:11:47,144 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2022-11-25 17:11:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:47,145 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-11-25 17:11:47,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-11-25 17:11:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:11:47,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:47,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:47,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:11:47,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash -906524851, now seen corresponding path program 1 times [2022-11-25 17:11:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:47,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839563091] [2022-11-25 17:11:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:47,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:47,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:47,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839563091] [2022-11-25 17:11:47,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839563091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:47,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:47,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:11:47,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030179041] [2022-11-25 17:11:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:47,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:11:47,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:11:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:11:47,246 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:47,265 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-11-25 17:11:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:11:47,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 17:11:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:47,268 INFO L225 Difference]: With dead ends: 35 [2022-11-25 17:11:47,268 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 17:11:47,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:11:47,270 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:47,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 17:11:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-11-25 17:11:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-25 17:11:47,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2022-11-25 17:11:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:47,278 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-25 17:11:47,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-25 17:11:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:11:47,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:47,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:47,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:11:47,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1897717841, now seen corresponding path program 1 times [2022-11-25 17:11:47,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:47,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307387495] [2022-11-25 17:11:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:47,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:47,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307387495] [2022-11-25 17:11:47,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307387495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:47,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:47,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:11:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522985719] [2022-11-25 17:11:47,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:47,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:11:47,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:11:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:11:47,365 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:47,398 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-25 17:11:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:11:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 17:11:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:47,403 INFO L225 Difference]: With dead ends: 48 [2022-11-25 17:11:47,403 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 17:11:47,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:11:47,405 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:47,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 17:11:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-25 17:11:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-25 17:11:47,415 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2022-11-25 17:11:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:47,416 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-25 17:11:47,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-25 17:11:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 17:11:47,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:47,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:47,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:11:47,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash 983883823, now seen corresponding path program 1 times [2022-11-25 17:11:47,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:47,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588949699] [2022-11-25 17:11:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:47,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:47,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:47,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588949699] [2022-11-25 17:11:47,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588949699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297447188] [2022-11-25 17:11:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:47,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:47,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:11:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:47,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:11:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:11:48,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:11:48,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297447188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:48,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:11:48,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-11-25 17:11:48,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021844145] [2022-11-25 17:11:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:48,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:11:48,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:11:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:11:48,146 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:48,280 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-11-25 17:11:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:11:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-25 17:11:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:48,284 INFO L225 Difference]: With dead ends: 44 [2022-11-25 17:11:48,284 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 17:11:48,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:11:48,293 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:48,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 17:11:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-25 17:11:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-25 17:11:48,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2022-11-25 17:11:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:48,300 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-25 17:11:48,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-25 17:11:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 17:11:48,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:48,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:48,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:11:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:48,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash 891572815, now seen corresponding path program 1 times [2022-11-25 17:11:48,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:48,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450330615] [2022-11-25 17:11:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:48,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:48,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450330615] [2022-11-25 17:11:48,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450330615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:48,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380727797] [2022-11-25 17:11:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:48,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:48,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:11:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:48,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:11:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:48,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:48,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380727797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:48,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:48,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-25 17:11:48,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534630302] [2022-11-25 17:11:48,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:48,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:11:48,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:11:48,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:11:48,785 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:48,814 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-11-25 17:11:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 15 [2022-11-25 17:11:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:48,816 INFO L225 Difference]: With dead ends: 50 [2022-11-25 17:11:48,817 INFO L226 Difference]: Without dead ends: 30 [2022-11-25 17:11:48,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:11:48,818 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:48,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-25 17:11:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-25 17:11:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-25 17:11:48,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-11-25 17:11:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:48,827 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-25 17:11:48,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-25 17:11:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 17:11:48,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:48,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:48,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 17:11:49,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:49,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash 353844429, now seen corresponding path program 2 times [2022-11-25 17:11:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109736246] [2022-11-25 17:11:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:11:49,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:49,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109736246] [2022-11-25 17:11:49,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109736246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:49,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:49,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:11:49,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516324574] [2022-11-25 17:11:49,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:49,251 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:49,322 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-11-25 17:11:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 17 [2022-11-25 17:11:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:49,325 INFO L225 Difference]: With dead ends: 34 [2022-11-25 17:11:49,326 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 17:11:49,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:11:49,328 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:49,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 17:11:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-25 17:11:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-25 17:11:49,352 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-11-25 17:11:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:49,353 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-25 17:11:49,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-25 17:11:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:11:49,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:49,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:49,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:11:49,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1453414625, now seen corresponding path program 1 times [2022-11-25 17:11:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950094046] [2022-11-25 17:11:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:49,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:11:49,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950094046] [2022-11-25 17:11:49,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950094046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101057266] [2022-11-25 17:11:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:49,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:49,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:49,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:49,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:11:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:11:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:11:49,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:11:49,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101057266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:49,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:49,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-11-25 17:11:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884733315] [2022-11-25 17:11:49,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:49,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:11:49,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:11:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:11:49,626 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:49,744 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-11-25 17:11:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:11:49,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 21 [2022-11-25 17:11:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:49,748 INFO L225 Difference]: With dead ends: 56 [2022-11-25 17:11:49,748 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:11:49,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:11:49,750 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:49,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 68 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:11:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-11-25 17:11:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-25 17:11:49,773 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2022-11-25 17:11:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:49,774 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-25 17:11:49,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-25 17:11:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 17:11:49,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:49,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:49,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:11:49,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1604143171, now seen corresponding path program 1 times [2022-11-25 17:11:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:49,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270257142] [2022-11-25 17:11:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:11:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:50,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270257142] [2022-11-25 17:11:50,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270257142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:50,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161297534] [2022-11-25 17:11:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:50,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:50,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:50,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:11:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:50,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:11:50,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:11:50,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:11:50,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161297534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:50,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:50,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-25 17:11:50,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285263453] [2022-11-25 17:11:50,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:50,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:11:50,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:11:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:11:50,268 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:50,315 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-11-25 17:11:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:11:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2022-11-25 17:11:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:50,317 INFO L225 Difference]: With dead ends: 59 [2022-11-25 17:11:50,317 INFO L226 Difference]: Without dead ends: 54 [2022-11-25 17:11:50,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:11:50,318 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:50,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 113 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-25 17:11:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2022-11-25 17:11:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-25 17:11:50,339 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2022-11-25 17:11:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:50,339 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-25 17:11:50,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-25 17:11:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 17:11:50,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:50,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:50,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:50,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:50,546 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:50,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1602296129, now seen corresponding path program 1 times [2022-11-25 17:11:50,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:50,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45573827] [2022-11-25 17:11:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:50,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:11:50,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:50,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45573827] [2022-11-25 17:11:50,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45573827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:50,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:50,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:11:50,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099088000] [2022-11-25 17:11:50,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:50,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:11:50,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:11:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:11:50,641 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:50,727 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-11-25 17:11:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:11:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 23 [2022-11-25 17:11:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:50,729 INFO L225 Difference]: With dead ends: 49 [2022-11-25 17:11:50,729 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:11:50,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:11:50,731 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:50,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:11:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-11-25 17:11:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-25 17:11:50,758 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2022-11-25 17:11:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:50,758 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-25 17:11:50,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-25 17:11:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:11:50,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:50,763 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:50,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:11:50,763 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:50,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1934230497, now seen corresponding path program 2 times [2022-11-25 17:11:50,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:50,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476942497] [2022-11-25 17:11:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:50,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476942497] [2022-11-25 17:11:51,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476942497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437288721] [2022-11-25 17:11:51,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:11:51,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:51,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:51,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:51,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:11:51,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:11:51,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:11:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:11:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:51,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:51,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437288721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:51,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:51,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-11-25 17:11:51,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185492786] [2022-11-25 17:11:51,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:51,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:11:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:11:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:11:51,876 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:52,378 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-11-25 17:11:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:11:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 25 [2022-11-25 17:11:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:52,379 INFO L225 Difference]: With dead ends: 55 [2022-11-25 17:11:52,380 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 17:11:52,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:11:52,381 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:52,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 17:11:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-25 17:11:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-11-25 17:11:52,396 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2022-11-25 17:11:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:52,396 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-11-25 17:11:52,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-11-25 17:11:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:11:52,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:52,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:52,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:52,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:52,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash 836427775, now seen corresponding path program 2 times [2022-11-25 17:11:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042698293] [2022-11-25 17:11:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:52,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:52,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042698293] [2022-11-25 17:11:52,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042698293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:52,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845820688] [2022-11-25 17:11:52,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:11:52,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:52,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:52,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:11:52,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:11:52,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:11:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:11:52,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:53,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:53,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845820688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:53,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:53,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-11-25 17:11:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637533771] [2022-11-25 17:11:53,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:53,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:11:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:11:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:11:53,766 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:54,109 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-11-25 17:11:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:11:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 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 25 [2022-11-25 17:11:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:54,111 INFO L225 Difference]: With dead ends: 47 [2022-11-25 17:11:54,111 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 17:11:54,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:11:54,113 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:54,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 38 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 17:11:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-11-25 17:11:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-25 17:11:54,125 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-11-25 17:11:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:54,125 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-25 17:11:54,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-25 17:11:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 17:11:54,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:54,126 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:54,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:54,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:11:54,332 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 924111969, now seen corresponding path program 3 times [2022-11-25 17:11:54,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:54,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646994122] [2022-11-25 17:11:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:54,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:54,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646994122] [2022-11-25 17:11:54,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646994122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900099329] [2022-11-25 17:11:54,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:11:54,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:54,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:54,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:54,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:11:54,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:11:54,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:11:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:11:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:55,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:55,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900099329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:55,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:55,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-11-25 17:11:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547030418] [2022-11-25 17:11:55,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:55,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:11:55,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:11:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:11:55,864 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:56,784 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-25 17:11:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:11:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 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 27 [2022-11-25 17:11:56,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:56,795 INFO L225 Difference]: With dead ends: 83 [2022-11-25 17:11:56,795 INFO L226 Difference]: Without dead ends: 64 [2022-11-25 17:11:56,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 17:11:56,797 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 179 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:56,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 121 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:11:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-25 17:11:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2022-11-25 17:11:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-25 17:11:56,830 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2022-11-25 17:11:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:56,831 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-25 17:11:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-25 17:11:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 17:11:56,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:56,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:56,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:57,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:11:57,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -98803427, now seen corresponding path program 3 times [2022-11-25 17:11:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:57,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405828125] [2022-11-25 17:11:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:57,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405828125] [2022-11-25 17:11:57,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405828125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221558137] [2022-11-25 17:11:57,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:11:57,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:57,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:57,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:57,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:11:57,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:11:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:11:57,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:11:57,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:57,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:58,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221558137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:58,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:58,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-11-25 17:11:58,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518539255] [2022-11-25 17:11:58,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:58,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:11:58,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:11:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:11:58,281 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:58,777 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-11-25 17:11:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:11:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 27 [2022-11-25 17:11:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:58,778 INFO L225 Difference]: With dead ends: 65 [2022-11-25 17:11:58,778 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 17:11:58,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 17:11:58,779 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 179 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:58,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 62 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 17:11:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2022-11-25 17:11:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-25 17:11:58,794 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2022-11-25 17:11:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:58,794 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-25 17:11:58,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-25 17:11:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:11:58,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:58,795 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:58,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:59,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:11:59,001 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1588252031, now seen corresponding path program 4 times [2022-11-25 17:11:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:59,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355965224] [2022-11-25 17:11:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355965224] [2022-11-25 17:11:59,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355965224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314615313] [2022-11-25 17:11:59,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:11:59,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:59,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:59,394 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:59,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:11:59,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:11:59,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:11:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:11:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:59,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314615313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:00,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:00,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-11-25 17:12:00,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974992822] [2022-11-25 17:12:00,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:00,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:12:00,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:12:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-11-25 17:12:00,213 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:00,801 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-11-25 17:12:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:12:00,802 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 29 [2022-11-25 17:12:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:00,802 INFO L225 Difference]: With dead ends: 63 [2022-11-25 17:12:00,802 INFO L226 Difference]: Without dead ends: 44 [2022-11-25 17:12:00,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 17:12:00,804 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:00,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 51 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:12:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-25 17:12:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-25 17:12:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-11-25 17:12:00,819 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2022-11-25 17:12:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:00,820 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-11-25 17:12:00,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-11-25 17:12:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:12:00,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:00,821 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:00,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:01,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:12:01,026 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash -462032417, now seen corresponding path program 4 times [2022-11-25 17:12:01,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:01,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65456283] [2022-11-25 17:12:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:01,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:01,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65456283] [2022-11-25 17:12:01,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65456283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832725030] [2022-11-25 17:12:01,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:12:01,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:01,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:01,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:01,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:12:01,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:12:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:12:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:01,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:02,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832725030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:02,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:02,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-11-25 17:12:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491899816] [2022-11-25 17:12:02,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:02,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:12:02,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:12:02,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2022-11-25 17:12:02,334 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:02,735 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-11-25 17:12:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:12:02,736 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 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 29 [2022-11-25 17:12:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:02,737 INFO L225 Difference]: With dead ends: 53 [2022-11-25 17:12:02,737 INFO L226 Difference]: Without dead ends: 47 [2022-11-25 17:12:02,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=914, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 17:12:02,741 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:02,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 32 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:12:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-25 17:12:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-25 17:12:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-11-25 17:12:02,761 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2022-11-25 17:12:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:02,761 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-11-25 17:12:02,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-11-25 17:12:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 17:12:02,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:02,765 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:02,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:12:02,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1355616703, now seen corresponding path program 5 times [2022-11-25 17:12:02,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:02,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036993582] [2022-11-25 17:12:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:02,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:03,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:03,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036993582] [2022-11-25 17:12:03,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036993582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441759386] [2022-11-25 17:12:03,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:12:03,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:03,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:03,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:03,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:12:03,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 17:12:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:12:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:04,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:04,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441759386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:04,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:04,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-25 17:12:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314364891] [2022-11-25 17:12:04,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:04,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:12:04,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:12:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 17:12:04,541 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:05,610 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-11-25 17:12:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:12:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 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 31 [2022-11-25 17:12:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:05,612 INFO L225 Difference]: With dead ends: 93 [2022-11-25 17:12:05,612 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 17:12:05,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=485, Invalid=1771, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 17:12:05,613 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 232 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:05,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 105 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 17:12:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2022-11-25 17:12:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-11-25 17:12:05,628 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2022-11-25 17:12:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:05,628 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-11-25 17:12:05,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-11-25 17:12:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 17:12:05,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:05,629 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:05,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:05,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:05,834 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:05,835 INFO L85 PathProgramCache]: Analyzing trace with hash 943358845, now seen corresponding path program 5 times [2022-11-25 17:12:05,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:05,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163226838] [2022-11-25 17:12:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:05,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163226838] [2022-11-25 17:12:06,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163226838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600481794] [2022-11-25 17:12:06,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:12:06,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:06,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:06,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:06,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:12:06,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 17:12:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:12:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:07,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600481794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:07,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:07,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-25 17:12:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369465114] [2022-11-25 17:12:07,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:07,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:12:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:12:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:12:07,229 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:07,825 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-11-25 17:12:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:12:07,826 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 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 31 [2022-11-25 17:12:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:07,826 INFO L225 Difference]: With dead ends: 71 [2022-11-25 17:12:07,826 INFO L226 Difference]: Without dead ends: 65 [2022-11-25 17:12:07,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=511, Invalid=1469, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 17:12:07,828 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:07,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 74 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:12:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-25 17:12:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2022-11-25 17:12:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-25 17:12:07,844 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2022-11-25 17:12:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:07,844 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-25 17:12:07,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-25 17:12:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:12:07,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:07,845 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:07,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:08,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:08,050 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1916151841, now seen corresponding path program 6 times [2022-11-25 17:12:08,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:08,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480829962] [2022-11-25 17:12:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:08,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480829962] [2022-11-25 17:12:08,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480829962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815625693] [2022-11-25 17:12:08,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:12:08,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:08,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:08,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:08,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:12:08,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-25 17:12:08,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:12:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:09,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815625693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:09,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:09,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-11-25 17:12:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497552042] [2022-11-25 17:12:09,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:09,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:12:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:12:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 17:12:09,430 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:10,115 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-25 17:12:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:12:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 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 33 [2022-11-25 17:12:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:10,117 INFO L225 Difference]: With dead ends: 71 [2022-11-25 17:12:10,117 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 17:12:10,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 17:12:10,118 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 87 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:10,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 121 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 17:12:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-25 17:12:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-25 17:12:10,133 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2022-11-25 17:12:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:10,133 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-25 17:12:10,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-25 17:12:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:12:10,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:10,135 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:10,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 17:12:10,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:12:10,340 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1672289471, now seen corresponding path program 6 times [2022-11-25 17:12:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:10,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319481715] [2022-11-25 17:12:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:10,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319481715] [2022-11-25 17:12:10,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319481715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273262753] [2022-11-25 17:12:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:12:10,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:10,795 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:10,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:12:10,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-25 17:12:10,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:10,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:12:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:11,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:11,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273262753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:11,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:11,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-11-25 17:12:11,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993413622] [2022-11-25 17:12:11,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:11,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:12:11,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:11,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:12:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 17:12:11,743 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:12,151 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-11-25 17:12:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:12:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 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 33 [2022-11-25 17:12:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:12,153 INFO L225 Difference]: With dead ends: 59 [2022-11-25 17:12:12,153 INFO L226 Difference]: Without dead ends: 53 [2022-11-25 17:12:12,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 17:12:12,154 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 208 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:12,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 28 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:12:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-25 17:12:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-11-25 17:12:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-11-25 17:12:12,172 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2022-11-25 17:12:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:12,174 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-11-25 17:12:12,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-11-25 17:12:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 17:12:12,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:12,175 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:12,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:12,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:12,386 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1028317473, now seen corresponding path program 7 times [2022-11-25 17:12:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:12,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431116026] [2022-11-25 17:12:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:12,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:12,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:12,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431116026] [2022-11-25 17:12:12,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431116026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:12,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363162944] [2022-11-25 17:12:12,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:12:12,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:12,909 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:12:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:12:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:13,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:14,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363162944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:14,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:14,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2022-11-25 17:12:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657543425] [2022-11-25 17:12:14,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:14,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 17:12:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 17:12:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 17:12:14,128 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:15,508 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-11-25 17:12:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:12:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 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 35 [2022-11-25 17:12:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:15,509 INFO L225 Difference]: With dead ends: 103 [2022-11-25 17:12:15,509 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 17:12:15,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=600, Invalid=2262, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:12:15,511 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 219 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:15,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 110 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 17:12:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2022-11-25 17:12:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-11-25 17:12:15,524 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2022-11-25 17:12:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:15,524 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-11-25 17:12:15,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-11-25 17:12:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 17:12:15,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:15,526 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:15,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:15,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-25 17:12:15,734 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash 208821981, now seen corresponding path program 7 times [2022-11-25 17:12:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307516697] [2022-11-25 17:12:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:15,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:16,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307516697] [2022-11-25 17:12:16,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307516697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:16,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326080496] [2022-11-25 17:12:16,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:12:16,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:16,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:16,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:16,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:12:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:12:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:16,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:17,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326080496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:17,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:17,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2022-11-25 17:12:17,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261966665] [2022-11-25 17:12:17,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:17,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 17:12:17,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 17:12:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 17:12:17,282 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:17,961 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-11-25 17:12:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:12:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 35 [2022-11-25 17:12:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:17,962 INFO L225 Difference]: With dead ends: 77 [2022-11-25 17:12:17,962 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 17:12:17,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=652, Invalid=1898, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 17:12:17,963 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 160 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:17,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 100 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 17:12:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2022-11-25 17:12:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-11-25 17:12:17,985 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2022-11-25 17:12:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:17,986 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-11-25 17:12:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-11-25 17:12:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:12:17,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:17,987 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:17,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:18,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:18,193 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash 863525695, now seen corresponding path program 8 times [2022-11-25 17:12:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:18,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357594904] [2022-11-25 17:12:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:18,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357594904] [2022-11-25 17:12:18,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357594904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:18,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833610927] [2022-11-25 17:12:18,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:12:18,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:18,642 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:18,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:12:18,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:12:18,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:12:18,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:19,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833610927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:19,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:19,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-11-25 17:12:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553169506] [2022-11-25 17:12:19,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:12:19,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:12:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 17:12:19,687 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:20,432 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-11-25 17:12:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:12:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 37 [2022-11-25 17:12:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:20,435 INFO L225 Difference]: With dead ends: 79 [2022-11-25 17:12:20,435 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 17:12:20,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=519, Invalid=1833, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:12:20,437 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 113 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:20,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 76 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 17:12:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-25 17:12:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-11-25 17:12:20,460 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2022-11-25 17:12:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:20,461 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-11-25 17:12:20,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-11-25 17:12:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:12:20,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:20,462 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:20,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:20,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:20,666 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1276272481, now seen corresponding path program 8 times [2022-11-25 17:12:20,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:20,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622400706] [2022-11-25 17:12:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:20,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:21,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622400706] [2022-11-25 17:12:21,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622400706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068611702] [2022-11-25 17:12:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:12:21,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:21,148 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:21,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:12:21,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:12:21,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:21,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:12:21,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:21,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:22,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068611702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:22,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:22,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2022-11-25 17:12:22,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698913551] [2022-11-25 17:12:22,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:22,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:12:22,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:12:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 17:12:22,244 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:22,748 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-11-25 17:12:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:12:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 37 [2022-11-25 17:12:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:22,750 INFO L225 Difference]: With dead ends: 65 [2022-11-25 17:12:22,750 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 17:12:22,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=602, Invalid=1654, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 17:12:22,751 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 249 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:22,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 54 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 17:12:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-11-25 17:12:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-11-25 17:12:22,771 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2022-11-25 17:12:22,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:22,771 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-11-25 17:12:22,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-11-25 17:12:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:12:22,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:22,772 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:22,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-25 17:12:22,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:22,978 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:22,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2138696961, now seen corresponding path program 9 times [2022-11-25 17:12:22,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:22,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383273855] [2022-11-25 17:12:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:22,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:23,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383273855] [2022-11-25 17:12:23,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383273855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854634146] [2022-11-25 17:12:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:12:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:23,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:23,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:12:23,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 17:12:23,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:12:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:24,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:24,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854634146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:24,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:24,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2022-11-25 17:12:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268591485] [2022-11-25 17:12:24,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 17:12:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 17:12:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 17:12:24,981 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:26,236 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-11-25 17:12:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:12:26,237 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 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 39 [2022-11-25 17:12:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:26,237 INFO L225 Difference]: With dead ends: 113 [2022-11-25 17:12:26,237 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 17:12:26,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=729, Invalid=2811, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 17:12:26,239 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 191 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:26,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 111 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 17:12:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2022-11-25 17:12:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-11-25 17:12:26,267 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2022-11-25 17:12:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:26,267 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-11-25 17:12:26,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-11-25 17:12:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:12:26,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:26,268 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:26,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:26,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:26,474 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1939262659, now seen corresponding path program 9 times [2022-11-25 17:12:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:26,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746244516] [2022-11-25 17:12:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:27,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:27,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746244516] [2022-11-25 17:12:27,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746244516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:27,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525257399] [2022-11-25 17:12:27,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:12:27,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:27,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:27,044 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:27,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:12:27,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 17:12:27,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:12:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:27,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:28,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525257399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:28,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:28,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2022-11-25 17:12:28,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955396910] [2022-11-25 17:12:28,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:28,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 17:12:28,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 17:12:28,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 17:12:28,306 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:29,000 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-11-25 17:12:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:12:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 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 39 [2022-11-25 17:12:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:29,001 INFO L225 Difference]: With dead ends: 83 [2022-11-25 17:12:29,001 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 17:12:29,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=811, Invalid=2381, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 17:12:29,002 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 237 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:29,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 68 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 17:12:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2022-11-25 17:12:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-11-25 17:12:29,018 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2022-11-25 17:12:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:29,018 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-11-25 17:12:29,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-11-25 17:12:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 17:12:29,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:29,019 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:29,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:29,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:29,230 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1861511265, now seen corresponding path program 10 times [2022-11-25 17:12:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:29,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471811060] [2022-11-25 17:12:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:29,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:29,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471811060] [2022-11-25 17:12:29,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471811060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:29,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900879139] [2022-11-25 17:12:29,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:12:29,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:29,761 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:29,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:12:29,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:12:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:12:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:30,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:30,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900879139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:30,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:30,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2022-11-25 17:12:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254739396] [2022-11-25 17:12:30,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-25 17:12:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-25 17:12:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 17:12:30,948 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:31,768 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2022-11-25 17:12:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:12:31,768 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 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 41 [2022-11-25 17:12:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:31,769 INFO L225 Difference]: With dead ends: 87 [2022-11-25 17:12:31,769 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 17:12:31,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=644, Invalid=2326, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 17:12:31,771 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 96 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:31,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 118 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 17:12:31,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-11-25 17:12:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-11-25 17:12:31,798 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 41 [2022-11-25 17:12:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:31,798 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-11-25 17:12:31,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-11-25 17:12:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 17:12:31,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:31,799 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:31,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:32,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 17:12:32,006 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:32,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1603583359, now seen corresponding path program 10 times [2022-11-25 17:12:32,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:32,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419449268] [2022-11-25 17:12:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:32,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:32,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419449268] [2022-11-25 17:12:32,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419449268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:32,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978251366] [2022-11-25 17:12:32,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:12:32,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:32,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:32,558 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:32,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:12:32,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:12:32,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:32,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:12:32,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:33,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:33,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978251366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:33,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:33,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2022-11-25 17:12:33,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829491627] [2022-11-25 17:12:33,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:33,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-25 17:12:33,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-25 17:12:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 17:12:33,742 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:34,293 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-11-25 17:12:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:12:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 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 41 [2022-11-25 17:12:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:34,294 INFO L225 Difference]: With dead ends: 71 [2022-11-25 17:12:34,294 INFO L226 Difference]: Without dead ends: 65 [2022-11-25 17:12:34,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:12:34,295 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:34,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 61 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-25 17:12:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-11-25 17:12:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-25 17:12:34,313 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2022-11-25 17:12:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:34,313 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-25 17:12:34,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-25 17:12:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:12:34,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:34,314 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:34,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:12:34,515 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -573746719, now seen corresponding path program 11 times [2022-11-25 17:12:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:34,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677605501] [2022-11-25 17:12:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:35,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:35,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677605501] [2022-11-25 17:12:35,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677605501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:35,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715086003] [2022-11-25 17:12:35,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:12:35,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:35,128 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:35,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:12:35,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-25 17:12:35,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:12:35,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:35,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:36,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715086003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:36,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:36,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2022-11-25 17:12:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832768463] [2022-11-25 17:12:36,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:36,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 17:12:36,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 17:12:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 17:12:36,674 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:38,104 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-11-25 17:12:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:12:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 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 43 [2022-11-25 17:12:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:38,106 INFO L225 Difference]: With dead ends: 123 [2022-11-25 17:12:38,106 INFO L226 Difference]: Without dead ends: 96 [2022-11-25 17:12:38,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 17:12:38,108 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:38,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 115 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:12:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-25 17:12:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2022-11-25 17:12:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-11-25 17:12:38,128 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 43 [2022-11-25 17:12:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:38,128 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-11-25 17:12:38,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-11-25 17:12:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:12:38,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:38,129 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:38,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:38,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:12:38,331 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash -709607267, now seen corresponding path program 11 times [2022-11-25 17:12:38,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:38,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734381210] [2022-11-25 17:12:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:38,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734381210] [2022-11-25 17:12:38,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734381210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075859652] [2022-11-25 17:12:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:12:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:38,985 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:38,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:12:39,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-25 17:12:39,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:39,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:12:39,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:39,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075859652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:40,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:40,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2022-11-25 17:12:40,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991999766] [2022-11-25 17:12:40,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:40,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 17:12:40,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 17:12:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 17:12:40,396 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:41,178 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-11-25 17:12:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:12:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 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 43 [2022-11-25 17:12:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:41,178 INFO L225 Difference]: With dead ends: 89 [2022-11-25 17:12:41,178 INFO L226 Difference]: Without dead ends: 83 [2022-11-25 17:12:41,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 17:12:41,180 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:41,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 77 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-25 17:12:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2022-11-25 17:12:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-11-25 17:12:41,205 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 43 [2022-11-25 17:12:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:41,205 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-11-25 17:12:41,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-11-25 17:12:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:12:41,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:41,206 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:41,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:12:41,407 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1278685953, now seen corresponding path program 12 times [2022-11-25 17:12:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:41,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536157306] [2022-11-25 17:12:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:41,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:41,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536157306] [2022-11-25 17:12:41,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536157306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:41,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033919255] [2022-11-25 17:12:41,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:12:41,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:41,968 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:41,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:12:42,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 17:12:42,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:12:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:43,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033919255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:43,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:43,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2022-11-25 17:12:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474156933] [2022-11-25 17:12:43,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 17:12:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:43,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 17:12:43,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:12:43,392 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:44,357 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2022-11-25 17:12:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:12:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 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 45 [2022-11-25 17:12:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:44,358 INFO L225 Difference]: With dead ends: 95 [2022-11-25 17:12:44,358 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 17:12:44,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=783, Invalid=2877, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 17:12:44,359 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:44,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 90 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 17:12:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-25 17:12:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-11-25 17:12:44,380 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 45 [2022-11-25 17:12:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:44,380 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-11-25 17:12:44,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-11-25 17:12:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:12:44,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:44,381 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:44,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-25 17:12:44,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:44,581 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1695567009, now seen corresponding path program 12 times [2022-11-25 17:12:44,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:44,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446684411] [2022-11-25 17:12:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446684411] [2022-11-25 17:12:45,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446684411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618474823] [2022-11-25 17:12:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:12:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:45,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:45,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:12:45,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 17:12:45,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:45,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:12:45,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:45,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:46,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618474823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:46,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:46,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2022-11-25 17:12:46,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481608054] [2022-11-25 17:12:46,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:46,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 17:12:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:46,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 17:12:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:12:46,524 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:47,119 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-11-25 17:12:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:12:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 45 [2022-11-25 17:12:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:47,120 INFO L225 Difference]: With dead ends: 77 [2022-11-25 17:12:47,120 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 17:12:47,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 17:12:47,122 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 252 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:47,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 30 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 17:12:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-25 17:12:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-11-25 17:12:47,146 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 45 [2022-11-25 17:12:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:47,147 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-11-25 17:12:47,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-11-25 17:12:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 17:12:47,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:47,147 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:47,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:47,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:47,350 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:47,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1371385919, now seen corresponding path program 13 times [2022-11-25 17:12:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:47,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978096484] [2022-11-25 17:12:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:47,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:48,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:48,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978096484] [2022-11-25 17:12:48,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978096484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:48,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077497607] [2022-11-25 17:12:48,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:12:48,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:48,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:48,007 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:48,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:12:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:12:48,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:48,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:49,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077497607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:49,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:49,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2022-11-25 17:12:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177350318] [2022-11-25 17:12:49,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-25 17:12:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-25 17:12:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 17:12:49,674 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:51,247 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-11-25 17:12:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 17:12:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 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 47 [2022-11-25 17:12:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:51,248 INFO L225 Difference]: With dead ends: 133 [2022-11-25 17:12:51,248 INFO L226 Difference]: Without dead ends: 104 [2022-11-25 17:12:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1029, Invalid=4083, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 17:12:51,250 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 158 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:51,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 126 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:12:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-25 17:12:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2022-11-25 17:12:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-11-25 17:12:51,274 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2022-11-25 17:12:51,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:51,275 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-11-25 17:12:51,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-11-25 17:12:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 17:12:51,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:51,276 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:51,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-25 17:12:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:51,476 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1311193347, now seen corresponding path program 13 times [2022-11-25 17:12:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428368402] [2022-11-25 17:12:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:51,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:52,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:52,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428368402] [2022-11-25 17:12:52,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428368402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:52,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129721269] [2022-11-25 17:12:52,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:12:52,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:52,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:52,223 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:52,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:12:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:12:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:53,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:53,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129721269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:53,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:53,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 55 [2022-11-25 17:12:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746212443] [2022-11-25 17:12:53,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:53,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-25 17:12:53,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-25 17:12:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 17:12:53,832 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:54,691 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-11-25 17:12:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:12:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 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 47 [2022-11-25 17:12:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:54,692 INFO L225 Difference]: With dead ends: 95 [2022-11-25 17:12:54,692 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 17:12:54,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1183, Invalid=3509, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 17:12:54,693 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:54,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 75 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 17:12:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2022-11-25 17:12:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-25 17:12:54,717 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 47 [2022-11-25 17:12:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:54,717 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-25 17:12:54,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-25 17:12:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:12:54,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:54,718 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:54,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:54,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 17:12:54,918 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 417676127, now seen corresponding path program 14 times [2022-11-25 17:12:54,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:54,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265757119] [2022-11-25 17:12:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:54,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:55,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265757119] [2022-11-25 17:12:55,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265757119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:55,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155707470] [2022-11-25 17:12:55,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:12:55,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:55,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:55,613 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:55,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:12:55,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:12:55,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:12:55,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:56,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:57,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155707470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:57,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:57,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2022-11-25 17:12:57,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640860028] [2022-11-25 17:12:57,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:57,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-25 17:12:57,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-25 17:12:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:12:57,191 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:12:58,197 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-11-25 17:12:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:12:58,197 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 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 49 [2022-11-25 17:12:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:12:58,198 INFO L225 Difference]: With dead ends: 103 [2022-11-25 17:12:58,198 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 17:12:58,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=936, Invalid=3486, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 17:12:58,200 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:12:58,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 61 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:12:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 17:12:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-25 17:12:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-11-25 17:12:58,235 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 49 [2022-11-25 17:12:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:12:58,236 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-11-25 17:12:58,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-11-25 17:12:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:12:58,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:12:58,237 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:58,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:58,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:58,447 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:12:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1748746815, now seen corresponding path program 14 times [2022-11-25 17:12:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:58,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709426638] [2022-11-25 17:12:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:58,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:59,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709426638] [2022-11-25 17:12:59,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709426638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423913462] [2022-11-25 17:12:59,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:12:59,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:59,231 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:59,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:12:59,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:12:59,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:12:59,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:00,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:00,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423913462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:00,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:00,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2022-11-25 17:13:00,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190247704] [2022-11-25 17:13:00,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-25 17:13:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-25 17:13:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:13:00,750 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:01,403 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-11-25 17:13:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:13:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 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 49 [2022-11-25 17:13:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:01,404 INFO L225 Difference]: With dead ends: 83 [2022-11-25 17:13:01,405 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 17:13:01,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 17:13:01,406 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 242 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:01,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 37 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:13:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 17:13:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-11-25 17:13:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-25 17:13:01,430 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 49 [2022-11-25 17:13:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:01,430 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-25 17:13:01,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-25 17:13:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:13:01,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:01,431 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:01,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:01,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 17:13:01,631 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1489381025, now seen corresponding path program 15 times [2022-11-25 17:13:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:01,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540237124] [2022-11-25 17:13:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:01,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540237124] [2022-11-25 17:13:02,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540237124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759959918] [2022-11-25 17:13:02,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:13:02,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:02,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:02,388 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:02,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:13:02,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-25 17:13:02,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:13:02,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:03,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:04,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759959918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:04,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:04,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2022-11-25 17:13:04,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744727407] [2022-11-25 17:13:04,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:04,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-25 17:13:04,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:04,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-25 17:13:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 17:13:04,253 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:06,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:06,249 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2022-11-25 17:13:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:13:06,250 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 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 51 [2022-11-25 17:13:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:06,252 INFO L225 Difference]: With dead ends: 143 [2022-11-25 17:13:06,252 INFO L226 Difference]: Without dead ends: 112 [2022-11-25 17:13:06,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 55 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1200, Invalid=4806, Unknown=0, NotChecked=0, Total=6006 [2022-11-25 17:13:06,253 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 130 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:06,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 100 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:13:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-25 17:13:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2022-11-25 17:13:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-11-25 17:13:06,282 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 51 [2022-11-25 17:13:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:06,282 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-11-25 17:13:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-11-25 17:13:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:13:06,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:06,283 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:06,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:06,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:13:06,483 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash 978060893, now seen corresponding path program 15 times [2022-11-25 17:13:06,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:06,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901708694] [2022-11-25 17:13:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:07,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901708694] [2022-11-25 17:13:07,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901708694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541297527] [2022-11-25 17:13:07,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:13:07,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:07,279 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:07,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:13:07,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-25 17:13:07,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:13:07,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:08,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:09,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541297527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:09,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:09,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2022-11-25 17:13:09,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616236462] [2022-11-25 17:13:09,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:09,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-25 17:13:09,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:09,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-25 17:13:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 17:13:09,094 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:10,072 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-11-25 17:13:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:13:10,073 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 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 51 [2022-11-25 17:13:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:10,073 INFO L225 Difference]: With dead ends: 101 [2022-11-25 17:13:10,073 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 17:13:10,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1396, Invalid=4154, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 17:13:10,075 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 321 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:10,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 99 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:13:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 17:13:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2022-11-25 17:13:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-11-25 17:13:10,103 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 51 [2022-11-25 17:13:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:10,103 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-11-25 17:13:10,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-11-25 17:13:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:13:10,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:10,104 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:10,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:13:10,305 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1367745215, now seen corresponding path program 16 times [2022-11-25 17:13:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:10,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177655731] [2022-11-25 17:13:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:11,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177655731] [2022-11-25 17:13:11,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177655731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:11,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829755709] [2022-11-25 17:13:11,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:13:11,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:11,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:11,075 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:11,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:13:11,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:13:11,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 17:13:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:12,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:12,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829755709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:12,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:12,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2022-11-25 17:13:12,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331852266] [2022-11-25 17:13:12,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:12,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-25 17:13:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-25 17:13:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2771, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 17:13:12,855 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:14,059 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2022-11-25 17:13:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:13:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 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 53 [2022-11-25 17:13:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:14,060 INFO L225 Difference]: With dead ends: 111 [2022-11-25 17:13:14,060 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 17:13:14,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1103, Invalid=4153, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 17:13:14,061 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:14,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 78 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:13:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 17:13:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-11-25 17:13:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-11-25 17:13:14,094 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 53 [2022-11-25 17:13:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:14,095 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-11-25 17:13:14,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-11-25 17:13:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:13:14,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:14,096 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:14,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 17:13:14,296 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1146738145, now seen corresponding path program 16 times [2022-11-25 17:13:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:14,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699490324] [2022-11-25 17:13:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:15,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:15,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699490324] [2022-11-25 17:13:15,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699490324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:15,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543018805] [2022-11-25 17:13:15,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:13:15,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:15,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:15,129 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:13:15,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:13:15,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:15,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 17:13:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:16,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:16,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543018805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:16,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:16,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2022-11-25 17:13:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121761530] [2022-11-25 17:13:16,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:16,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-25 17:13:16,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-25 17:13:16,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 17:13:16,891 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:17,720 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-11-25 17:13:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:13:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 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 53 [2022-11-25 17:13:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:17,721 INFO L225 Difference]: With dead ends: 89 [2022-11-25 17:13:17,721 INFO L226 Difference]: Without dead ends: 83 [2022-11-25 17:13:17,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1330, Invalid=3782, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 17:13:17,722 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 250 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:17,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 63 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:13:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-25 17:13:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-11-25 17:13:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-11-25 17:13:17,756 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2022-11-25 17:13:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:17,756 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-11-25 17:13:17,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-11-25 17:13:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 17:13:17,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:17,757 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:17,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:17,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:17,967 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2067142273, now seen corresponding path program 17 times [2022-11-25 17:13:17,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:17,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124856504] [2022-11-25 17:13:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:17,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:18,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124856504] [2022-11-25 17:13:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124856504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957074440] [2022-11-25 17:13:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:13:18,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:18,779 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:18,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 17:13:18,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-25 17:13:18,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:13:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:19,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:20,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957074440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:20,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:20,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 66 [2022-11-25 17:13:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195270826] [2022-11-25 17:13:20,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:20,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-25 17:13:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-25 17:13:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3526, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 17:13:20,913 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:23,196 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-11-25 17:13:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:13:23,197 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 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 55 [2022-11-25 17:13:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:23,198 INFO L225 Difference]: With dead ends: 153 [2022-11-25 17:13:23,198 INFO L226 Difference]: Without dead ends: 120 [2022-11-25 17:13:23,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 59 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3183 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 17:13:23,199 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 167 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:23,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 122 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:13:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-25 17:13:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2022-11-25 17:13:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-11-25 17:13:23,227 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 55 [2022-11-25 17:13:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:23,228 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-11-25 17:13:23,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-11-25 17:13:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 17:13:23,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:23,229 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:23,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 17:13:23,439 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2087927485, now seen corresponding path program 17 times [2022-11-25 17:13:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:23,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472715119] [2022-11-25 17:13:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:24,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472715119] [2022-11-25 17:13:24,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472715119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:24,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444580229] [2022-11-25 17:13:24,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:13:24,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:24,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:24,334 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:24,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 17:13:24,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-25 17:13:24,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:13:24,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:26,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444580229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:26,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:26,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 65 [2022-11-25 17:13:26,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362461551] [2022-11-25 17:13:26,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:26,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-25 17:13:26,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-25 17:13:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 17:13:26,294 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:27,280 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-11-25 17:13:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:13:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 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 55 [2022-11-25 17:13:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:27,281 INFO L225 Difference]: With dead ends: 107 [2022-11-25 17:13:27,282 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 17:13:27,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 60 SyntacticMatches, 13 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1627, Invalid=4853, Unknown=0, NotChecked=0, Total=6480 [2022-11-25 17:13:27,282 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 335 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:27,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 65 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:13:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 17:13:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2022-11-25 17:13:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-11-25 17:13:27,315 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 55 [2022-11-25 17:13:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:27,315 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-11-25 17:13:27,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-11-25 17:13:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 17:13:27,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:27,316 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:27,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:27,518 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1497316577, now seen corresponding path program 18 times [2022-11-25 17:13:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:27,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117602762] [2022-11-25 17:13:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:28,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117602762] [2022-11-25 17:13:28,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117602762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275984543] [2022-11-25 17:13:28,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:13:28,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:28,255 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:28,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 17:13:28,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-25 17:13:28,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:13:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:29,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:30,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275984543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:30,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:30,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2022-11-25 17:13:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085705513] [2022-11-25 17:13:30,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-25 17:13:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-25 17:13:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 17:13:30,220 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:31,584 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2022-11-25 17:13:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 17:13:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 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 57 [2022-11-25 17:13:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:31,585 INFO L225 Difference]: With dead ends: 119 [2022-11-25 17:13:31,585 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 17:13:31,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 65 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1284, Invalid=4878, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 17:13:31,587 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:31,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 125 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:13:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 17:13:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-25 17:13:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-11-25 17:13:31,617 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 57 [2022-11-25 17:13:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:31,617 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-11-25 17:13:31,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-11-25 17:13:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 17:13:31,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:31,618 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:31,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:31,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:31,818 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:31,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1622398209, now seen corresponding path program 18 times [2022-11-25 17:13:31,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:31,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527807025] [2022-11-25 17:13:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:31,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:32,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:32,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527807025] [2022-11-25 17:13:32,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527807025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:32,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733537240] [2022-11-25 17:13:32,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:13:32,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:32,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:32,686 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:32,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 17:13:32,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-25 17:13:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:13:32,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:33,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:34,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733537240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:34,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:34,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2022-11-25 17:13:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818290616] [2022-11-25 17:13:34,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:34,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-25 17:13:34,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-25 17:13:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=3259, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 17:13:34,628 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:35,441 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-11-25 17:13:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:13:35,441 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 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 57 [2022-11-25 17:13:35,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:35,442 INFO L225 Difference]: With dead ends: 95 [2022-11-25 17:13:35,442 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 17:13:35,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 65 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2918 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1557, Invalid=4449, Unknown=0, NotChecked=0, Total=6006 [2022-11-25 17:13:35,443 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 269 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:35,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 39 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:13:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 17:13:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-11-25 17:13:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-11-25 17:13:35,474 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 57 [2022-11-25 17:13:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:35,474 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-11-25 17:13:35,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-11-25 17:13:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 17:13:35,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:35,475 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:35,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:35,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-25 17:13:35,681 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash 224354145, now seen corresponding path program 19 times [2022-11-25 17:13:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:35,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519218279] [2022-11-25 17:13:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:36,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:36,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519218279] [2022-11-25 17:13:36,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519218279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:36,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900493348] [2022-11-25 17:13:36,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:13:36,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:36,513 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:36,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 17:13:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:36,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:13:36,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:37,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:38,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900493348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:38,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:38,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2022-11-25 17:13:38,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565200789] [2022-11-25 17:13:38,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:38,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 17:13:38,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:38,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 17:13:38,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=4086, Unknown=0, NotChecked=0, Total=4970 [2022-11-25 17:13:38,868 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:41,345 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-11-25 17:13:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:13:41,346 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 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 59 [2022-11-25 17:13:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:41,346 INFO L225 Difference]: With dead ends: 163 [2022-11-25 17:13:41,346 INFO L226 Difference]: Without dead ends: 128 [2022-11-25 17:13:41,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 63 SyntacticMatches, 14 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3717 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1584, Invalid=6426, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 17:13:41,347 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 120 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:41,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 120 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:13:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-25 17:13:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2022-11-25 17:13:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-11-25 17:13:41,381 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 59 [2022-11-25 17:13:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:41,382 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-11-25 17:13:41,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-11-25 17:13:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 17:13:41,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:41,382 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:41,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:41,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-25 17:13:41,583 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash 497266717, now seen corresponding path program 19 times [2022-11-25 17:13:41,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:41,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773068963] [2022-11-25 17:13:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:41,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773068963] [2022-11-25 17:13:42,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773068963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217380765] [2022-11-25 17:13:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:13:42,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:42,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:42,604 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:42,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 17:13:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:42,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:13:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:43,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:44,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217380765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:44,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:44,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 70 [2022-11-25 17:13:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525562280] [2022-11-25 17:13:44,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:44,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-25 17:13:44,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-25 17:13:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=886, Invalid=3944, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 17:13:44,796 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:45,941 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-11-25 17:13:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 17:13:45,941 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 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 59 [2022-11-25 17:13:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:45,942 INFO L225 Difference]: With dead ends: 113 [2022-11-25 17:13:45,942 INFO L226 Difference]: Without dead ends: 107 [2022-11-25 17:13:45,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 64 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3527 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1876, Invalid=5606, Unknown=0, NotChecked=0, Total=7482 [2022-11-25 17:13:45,943 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 344 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:45,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 101 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:13:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-25 17:13:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2022-11-25 17:13:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-11-25 17:13:45,981 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 59 [2022-11-25 17:13:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:45,981 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-11-25 17:13:45,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-11-25 17:13:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:13:45,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:45,982 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:45,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-25 17:13:46,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 17:13:46,182 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1113957249, now seen corresponding path program 20 times [2022-11-25 17:13:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:46,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428942642] [2022-11-25 17:13:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:46,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428942642] [2022-11-25 17:13:46,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428942642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347299335] [2022-11-25 17:13:46,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:13:46,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:46,964 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:46,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 17:13:47,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:13:47,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:13:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:48,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347299335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:49,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:49,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2022-11-25 17:13:49,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171514392] [2022-11-25 17:13:49,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:49,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-25 17:13:49,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-25 17:13:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=3808, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 17:13:49,133 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:50,641 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-11-25 17:13:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:13:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 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 61 [2022-11-25 17:13:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:50,643 INFO L225 Difference]: With dead ends: 127 [2022-11-25 17:13:50,643 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 17:13:50,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3488 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1479, Invalid=5661, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 17:13:50,644 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:50,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 126 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:13:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 17:13:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-11-25 17:13:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-11-25 17:13:50,678 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 61 [2022-11-25 17:13:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:50,678 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-11-25 17:13:50,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-11-25 17:13:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:13:50,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:50,679 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:50,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:50,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:50,882 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1463485663, now seen corresponding path program 20 times [2022-11-25 17:13:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:50,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603664619] [2022-11-25 17:13:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603664619] [2022-11-25 17:13:51,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603664619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292009153] [2022-11-25 17:13:51,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:13:51,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:51,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:51,849 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:51,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 17:13:51,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:13:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:13:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:52,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:53,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292009153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:53,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:53,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2022-11-25 17:13:53,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879035264] [2022-11-25 17:13:53,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:53,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-25 17:13:53,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:53,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-25 17:13:53,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=3797, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 17:13:53,997 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:54,976 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-11-25 17:13:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:13:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 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 61 [2022-11-25 17:13:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:54,977 INFO L225 Difference]: With dead ends: 101 [2022-11-25 17:13:54,977 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 17:13:54,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3429 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1802, Invalid=5170, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 17:13:54,978 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 167 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:54,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 70 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:13:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 17:13:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-25 17:13:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-11-25 17:13:55,021 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 61 [2022-11-25 17:13:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:55,021 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-11-25 17:13:55,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-11-25 17:13:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 17:13:55,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:55,022 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:55,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:55,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:55,224 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2063646399, now seen corresponding path program 21 times [2022-11-25 17:13:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:55,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622918053] [2022-11-25 17:13:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:56,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:56,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622918053] [2022-11-25 17:13:56,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622918053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:56,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108513496] [2022-11-25 17:13:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:13:56,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:56,201 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:56,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 17:13:56,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-25 17:13:56,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:13:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:57,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:58,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108513496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:58,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:58,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2022-11-25 17:13:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955515447] [2022-11-25 17:13:58,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-25 17:13:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-25 17:13:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=4687, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 17:13:58,882 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:01,208 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-11-25 17:14:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:14:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 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 63 [2022-11-25 17:14:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:01,209 INFO L225 Difference]: With dead ends: 173 [2022-11-25 17:14:01,209 INFO L226 Difference]: Without dead ends: 136 [2022-11-25 17:14:01,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 67 SyntacticMatches, 15 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4292 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1797, Invalid=7323, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 17:14:01,211 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 274 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:01,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 106 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:14:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-25 17:14:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2022-11-25 17:14:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-11-25 17:14:01,249 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 63 [2022-11-25 17:14:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:01,250 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-11-25 17:14:01,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-11-25 17:14:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 17:14:01,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:01,251 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:01,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:01,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 17:14:01,458 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:01,458 INFO L85 PathProgramCache]: Analyzing trace with hash -14509443, now seen corresponding path program 21 times [2022-11-25 17:14:01,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:01,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30173791] [2022-11-25 17:14:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:01,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30173791] [2022-11-25 17:14:02,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30173791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777504923] [2022-11-25 17:14:02,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:14:02,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:02,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:02,685 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:02,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 17:14:02,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-25 17:14:02,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:14:02,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:04,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:05,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777504923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:05,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:05,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 75 [2022-11-25 17:14:05,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175055916] [2022-11-25 17:14:05,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:05,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-25 17:14:05,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:05,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-25 17:14:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=4534, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 17:14:05,393 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:06,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:06,555 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-11-25 17:14:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:14:06,556 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 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 63 [2022-11-25 17:14:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:06,556 INFO L225 Difference]: With dead ends: 119 [2022-11-25 17:14:06,557 INFO L226 Difference]: Without dead ends: 113 [2022-11-25 17:14:06,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 68 SyntacticMatches, 15 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4087 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2143, Invalid=6413, Unknown=0, NotChecked=0, Total=8556 [2022-11-25 17:14:06,559 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 373 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:06,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 69 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:14:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-25 17:14:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2022-11-25 17:14:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-11-25 17:14:06,601 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 63 [2022-11-25 17:14:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:06,601 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-11-25 17:14:06,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-11-25 17:14:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 17:14:06,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:06,602 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:06,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 17:14:06,808 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 990392031, now seen corresponding path program 22 times [2022-11-25 17:14:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:06,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93418074] [2022-11-25 17:14:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:06,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:07,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93418074] [2022-11-25 17:14:07,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93418074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042598983] [2022-11-25 17:14:07,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:14:07,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:07,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:07,777 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 17:14:07,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:14:07,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:07,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:14:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:09,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:10,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042598983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:10,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:10,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2022-11-25 17:14:10,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498082867] [2022-11-25 17:14:10,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:10,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-25 17:14:10,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-25 17:14:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 17:14:10,393 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:12,131 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2022-11-25 17:14:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:14:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 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 65 [2022-11-25 17:14:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:12,132 INFO L225 Difference]: With dead ends: 135 [2022-11-25 17:14:12,132 INFO L226 Difference]: Without dead ends: 98 [2022-11-25 17:14:12,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 73 SyntacticMatches, 15 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4045 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1688, Invalid=6502, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 17:14:12,133 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:12,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 111 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:14:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-25 17:14:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-11-25 17:14:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-11-25 17:14:12,178 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 65 [2022-11-25 17:14:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:12,178 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-11-25 17:14:12,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-11-25 17:14:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 17:14:12,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:12,179 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:12,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-25 17:14:12,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 17:14:12,379 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2056259649, now seen corresponding path program 22 times [2022-11-25 17:14:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:12,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130764496] [2022-11-25 17:14:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:12,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:13,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130764496] [2022-11-25 17:14:13,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130764496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261016529] [2022-11-25 17:14:13,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:14:13,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:13,481 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:13,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 17:14:13,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:14:13,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:14:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:14,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:16,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261016529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:16,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:16,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2022-11-25 17:14:16,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070347967] [2022-11-25 17:14:16,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:16,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-25 17:14:16,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:16,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-25 17:14:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=4376, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 17:14:16,006 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:17,101 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-11-25 17:14:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 17:14:17,102 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 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 65 [2022-11-25 17:14:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:17,103 INFO L225 Difference]: With dead ends: 107 [2022-11-25 17:14:17,103 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 17:14:17,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 73 SyntacticMatches, 15 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3981 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2065, Invalid=5945, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 17:14:17,104 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 452 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:17,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 63 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:14:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 17:14:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-11-25 17:14:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-11-25 17:14:17,149 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 65 [2022-11-25 17:14:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:17,149 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-11-25 17:14:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-11-25 17:14:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 17:14:17,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:17,150 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:17,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:17,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:17,354 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:17,354 INFO L85 PathProgramCache]: Analyzing trace with hash -104661983, now seen corresponding path program 23 times [2022-11-25 17:14:17,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:17,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922374239] [2022-11-25 17:14:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:17,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:18,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922374239] [2022-11-25 17:14:18,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922374239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695790366] [2022-11-25 17:14:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:14:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:18,479 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:18,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 17:14:18,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-25 17:14:18,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 17:14:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:20,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:21,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695790366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:21,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:21,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 81 [2022-11-25 17:14:21,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094110095] [2022-11-25 17:14:21,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:21,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-25 17:14:21,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:21,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-25 17:14:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=5329, Unknown=0, NotChecked=0, Total=6480 [2022-11-25 17:14:21,732 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:24,263 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-11-25 17:14:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 17:14:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 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 67 [2022-11-25 17:14:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:24,264 INFO L225 Difference]: With dead ends: 183 [2022-11-25 17:14:24,264 INFO L226 Difference]: Without dead ends: 144 [2022-11-25 17:14:24,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 71 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4908 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2024, Invalid=8278, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 17:14:24,266 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:24,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 163 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:14:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-25 17:14:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2022-11-25 17:14:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-11-25 17:14:24,329 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 67 [2022-11-25 17:14:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:24,329 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-11-25 17:14:24,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-11-25 17:14:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 17:14:24,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:24,330 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:24,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:24,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-25 17:14:24,536 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash -500875811, now seen corresponding path program 23 times [2022-11-25 17:14:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436563127] [2022-11-25 17:14:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:24,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:25,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:25,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436563127] [2022-11-25 17:14:25,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436563127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:25,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258125660] [2022-11-25 17:14:25,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:14:25,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:25,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:25,872 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:25,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-25 17:14:25,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-25 17:14:25,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 17:14:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:27,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258125660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:28,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:28,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 80 [2022-11-25 17:14:28,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777333610] [2022-11-25 17:14:28,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:28,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-25 17:14:28,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-25 17:14:28,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=5165, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 17:14:28,977 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:30,397 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-11-25 17:14:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:14:30,398 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 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 67 [2022-11-25 17:14:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:30,398 INFO L225 Difference]: With dead ends: 125 [2022-11-25 17:14:30,398 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 17:14:30,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4688 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2428, Invalid=7274, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 17:14:30,399 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 338 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:30,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 89 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:14:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 17:14:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2022-11-25 17:14:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-11-25 17:14:30,454 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 67 [2022-11-25 17:14:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:30,454 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-11-25 17:14:30,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-11-25 17:14:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 17:14:30,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:30,455 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:30,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:30,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:30,661 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1743747647, now seen corresponding path program 24 times [2022-11-25 17:14:30,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:30,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083109597] [2022-11-25 17:14:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:30,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:31,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:31,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083109597] [2022-11-25 17:14:31,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083109597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147765645] [2022-11-25 17:14:31,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:14:31,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:31,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:31,858 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:31,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 17:14:31,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-25 17:14:31,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:31,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:14:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:33,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:34,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147765645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:34,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:34,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2022-11-25 17:14:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753232177] [2022-11-25 17:14:34,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:34,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-25 17:14:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-25 17:14:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5009, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 17:14:34,904 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:36,884 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2022-11-25 17:14:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:14:36,885 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 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 69 [2022-11-25 17:14:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:36,886 INFO L225 Difference]: With dead ends: 143 [2022-11-25 17:14:36,887 INFO L226 Difference]: Without dead ends: 104 [2022-11-25 17:14:36,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 77 SyntacticMatches, 16 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1911, Invalid=7401, Unknown=0, NotChecked=0, Total=9312 [2022-11-25 17:14:36,888 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:36,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 132 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:14:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-25 17:14:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-11-25 17:14:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-11-25 17:14:36,974 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 69 [2022-11-25 17:14:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:36,975 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-11-25 17:14:36,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-11-25 17:14:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 17:14:36,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:36,976 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:36,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:37,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-25 17:14:37,186 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1306018719, now seen corresponding path program 24 times [2022-11-25 17:14:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:37,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163606054] [2022-11-25 17:14:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:37,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:38,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163606054] [2022-11-25 17:14:38,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163606054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:38,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903195485] [2022-11-25 17:14:38,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:14:38,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:38,325 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:38,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-25 17:14:38,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-25 17:14:38,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:14:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:39,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:41,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903195485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:41,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:41,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2022-11-25 17:14:41,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084713152] [2022-11-25 17:14:41,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:41,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-25 17:14:41,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-25 17:14:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=4996, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 17:14:41,215 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:42,400 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-11-25 17:14:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:14:42,401 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-25 17:14:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:42,401 INFO L225 Difference]: With dead ends: 113 [2022-11-25 17:14:42,401 INFO L226 Difference]: Without dead ends: 107 [2022-11-25 17:14:42,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 77 SyntacticMatches, 16 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4574 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2346, Invalid=6774, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 17:14:42,402 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 397 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:42,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 38 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:14:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-25 17:14:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-11-25 17:14:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-11-25 17:14:42,474 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 69 [2022-11-25 17:14:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:42,474 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-11-25 17:14:42,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-11-25 17:14:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 17:14:42,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:42,475 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:42,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:42,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:42,675 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1229443073, now seen corresponding path program 25 times [2022-11-25 17:14:42,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273004121] [2022-11-25 17:14:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:42,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:43,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273004121] [2022-11-25 17:14:43,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273004121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240294483] [2022-11-25 17:14:43,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:14:43,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:43,798 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:43,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-25 17:14:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:14:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:45,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:46,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240294483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:46,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:46,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 86 [2022-11-25 17:14:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842999505] [2022-11-25 17:14:46,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-25 17:14:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-25 17:14:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=6012, Unknown=0, NotChecked=0, Total=7310 [2022-11-25 17:14:46,986 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 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) [2022-11-25 17:14:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:50,525 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2022-11-25 17:14:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:14:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 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 71 [2022-11-25 17:14:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:50,527 INFO L225 Difference]: With dead ends: 193 [2022-11-25 17:14:50,527 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 17:14:50,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 75 SyntacticMatches, 17 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2265, Invalid=9291, Unknown=0, NotChecked=0, Total=11556 [2022-11-25 17:14:50,529 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 166 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:50,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 150 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:14:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 17:14:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2022-11-25 17:14:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-11-25 17:14:50,599 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 71 [2022-11-25 17:14:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:50,599 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-11-25 17:14:50,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 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) [2022-11-25 17:14:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-11-25 17:14:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 17:14:50,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:50,600 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:50,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-25 17:14:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-25 17:14:50,801 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash 198236733, now seen corresponding path program 25 times [2022-11-25 17:14:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403254151] [2022-11-25 17:14:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:52,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403254151] [2022-11-25 17:14:52,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403254151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:52,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2642431] [2022-11-25 17:14:52,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:14:52,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:52,102 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:52,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-25 17:14:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:14:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:53,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:55,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2642431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:55,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:55,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 85 [2022-11-25 17:14:55,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198938072] [2022-11-25 17:14:55,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:55,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-25 17:14:55,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-25 17:14:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=5837, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 17:14:55,337 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 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) [2022-11-25 17:14:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:14:57,004 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-11-25 17:14:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:14:57,004 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 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 71 [2022-11-25 17:14:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:14:57,005 INFO L225 Difference]: With dead ends: 131 [2022-11-25 17:14:57,005 INFO L226 Difference]: Without dead ends: 125 [2022-11-25 17:14:57,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 76 SyntacticMatches, 17 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5330 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2731, Invalid=8189, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 17:14:57,007 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 353 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:14:57,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 121 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:14:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-25 17:14:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2022-11-25 17:14:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-11-25 17:14:57,102 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 71 [2022-11-25 17:14:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:14:57,103 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-11-25 17:14:57,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 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) [2022-11-25 17:14:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-11-25 17:14:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 17:14:57,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:14:57,104 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:57,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:57,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-25 17:14:57,310 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:14:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:57,310 INFO L85 PathProgramCache]: Analyzing trace with hash -718963041, now seen corresponding path program 26 times [2022-11-25 17:14:57,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:57,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066051339] [2022-11-25 17:14:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 198 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:58,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:58,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066051339] [2022-11-25 17:14:58,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066051339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:58,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775251539] [2022-11-25 17:14:58,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:14:58,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:58,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:58,558 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:58,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-25 17:14:58,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:14:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:58,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:14:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:00,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775251539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:01,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2022-11-25 17:15:01,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833238036] [2022-11-25 17:15:01,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:01,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-25 17:15:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-25 17:15:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=5671, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 17:15:01,840 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 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) [2022-11-25 17:15:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:03,783 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-11-25 17:15:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:15:03,784 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 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 73 [2022-11-25 17:15:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:03,785 INFO L225 Difference]: With dead ends: 151 [2022-11-25 17:15:03,785 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 17:15:03,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 81 SyntacticMatches, 17 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5282 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2148, Invalid=8358, Unknown=0, NotChecked=0, Total=10506 [2022-11-25 17:15:03,786 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:03,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 118 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:15:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 17:15:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-11-25 17:15:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-11-25 17:15:03,833 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 73 [2022-11-25 17:15:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:03,834 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-11-25 17:15:03,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 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) [2022-11-25 17:15:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-11-25 17:15:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 17:15:03,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:03,835 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:03,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-25 17:15:04,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-25 17:15:04,035 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2052139135, now seen corresponding path program 26 times [2022-11-25 17:15:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:04,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728667314] [2022-11-25 17:15:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:04,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 169 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:05,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:05,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728667314] [2022-11-25 17:15:05,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728667314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:05,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874348980] [2022-11-25 17:15:05,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:05,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:05,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:05,410 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:05,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-25 17:15:05,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:05,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:15:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:07,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:08,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874348980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:08,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:08,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2022-11-25 17:15:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186426887] [2022-11-25 17:15:08,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:08,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-25 17:15:08,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-25 17:15:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=5657, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 17:15:08,782 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:10,151 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-11-25 17:15:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:15:10,152 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 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 73 [2022-11-25 17:15:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:10,152 INFO L225 Difference]: With dead ends: 119 [2022-11-25 17:15:10,152 INFO L226 Difference]: Without dead ends: 113 [2022-11-25 17:15:10,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 81 SyntacticMatches, 17 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5208 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2645, Invalid=7657, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 17:15:10,154 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 317 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:10,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 70 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:15:10,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-25 17:15:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-25 17:15:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-11-25 17:15:10,222 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 73 [2022-11-25 17:15:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:10,222 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-11-25 17:15:10,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-11-25 17:15:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 17:15:10,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:10,223 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:10,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-25 17:15:10,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-25 17:15:10,424 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:10,424 INFO L85 PathProgramCache]: Analyzing trace with hash 991624417, now seen corresponding path program 27 times [2022-11-25 17:15:10,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:10,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123349626] [2022-11-25 17:15:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:10,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:11,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123349626] [2022-11-25 17:15:11,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123349626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561807250] [2022-11-25 17:15:11,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:15:11,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:11,733 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-25 17:15:11,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-25 17:15:11,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:15:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:13,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:15,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561807250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:15,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:15,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2022-11-25 17:15:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639198390] [2022-11-25 17:15:15,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:15,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-25 17:15:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-25 17:15:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1454, Invalid=6736, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 17:15:15,459 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:19,107 INFO L93 Difference]: Finished difference Result 203 states and 208 transitions. [2022-11-25 17:15:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 17:15:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-25 17:15:19,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:19,108 INFO L225 Difference]: With dead ends: 203 [2022-11-25 17:15:19,108 INFO L226 Difference]: Without dead ends: 160 [2022-11-25 17:15:19,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 79 SyntacticMatches, 18 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6263 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2520, Invalid=10362, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 17:15:19,110 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 204 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:19,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 152 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:15:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-25 17:15:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2022-11-25 17:15:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-11-25 17:15:19,169 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 75 [2022-11-25 17:15:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:19,169 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-11-25 17:15:19,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-11-25 17:15:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 17:15:19,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:19,170 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:19,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:19,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-25 17:15:19,376 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash -382029923, now seen corresponding path program 27 times [2022-11-25 17:15:19,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:19,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132694304] [2022-11-25 17:15:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:19,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132694304] [2022-11-25 17:15:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132694304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757924157] [2022-11-25 17:15:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:15:20,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:20,764 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-25 17:15:20,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-25 17:15:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:15:20,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:22,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:24,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757924157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:24,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2022-11-25 17:15:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212237335] [2022-11-25 17:15:24,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:24,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-25 17:15:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-25 17:15:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=6550, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 17:15:24,519 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:26,154 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-11-25 17:15:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 17:15:26,154 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-25 17:15:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:26,155 INFO L225 Difference]: With dead ends: 137 [2022-11-25 17:15:26,155 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 17:15:26,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 80 SyntacticMatches, 18 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6013 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3052, Invalid=9158, Unknown=0, NotChecked=0, Total=12210 [2022-11-25 17:15:26,156 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:26,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 79 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:15:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 17:15:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2022-11-25 17:15:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-11-25 17:15:26,240 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 75 [2022-11-25 17:15:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:26,241 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-11-25 17:15:26,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-11-25 17:15:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 17:15:26,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:26,242 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:26,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:26,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-11-25 17:15:26,447 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -9470977, now seen corresponding path program 28 times [2022-11-25 17:15:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541454500] [2022-11-25 17:15:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 227 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:27,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541454500] [2022-11-25 17:15:27,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541454500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582736746] [2022-11-25 17:15:27,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:15:27,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:27,568 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:27,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-25 17:15:27,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:15:27,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:15:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:29,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:30,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582736746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:30,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:30,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2022-11-25 17:15:30,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983543651] [2022-11-25 17:15:30,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:30,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-25 17:15:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:30,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-25 17:15:30,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1458, Invalid=6374, Unknown=0, NotChecked=0, Total=7832 [2022-11-25 17:15:30,921 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:33,237 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2022-11-25 17:15:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 17:15:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-25 17:15:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:33,239 INFO L225 Difference]: With dead ends: 159 [2022-11-25 17:15:33,239 INFO L226 Difference]: Without dead ends: 116 [2022-11-25 17:15:33,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 85 SyntacticMatches, 18 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5962 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2399, Invalid=9373, Unknown=0, NotChecked=0, Total=11772 [2022-11-25 17:15:33,240 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:33,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 113 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:15:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-25 17:15:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-11-25 17:15:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-11-25 17:15:33,328 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 77 [2022-11-25 17:15:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:33,329 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-11-25 17:15:33,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-11-25 17:15:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 17:15:33,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:33,329 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:33,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:33,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:33,530 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:33,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:33,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1633163681, now seen corresponding path program 28 times [2022-11-25 17:15:33,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:33,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017080615] [2022-11-25 17:15:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:33,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 196 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:34,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017080615] [2022-11-25 17:15:34,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017080615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:34,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384624416] [2022-11-25 17:15:34,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:15:34,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:34,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:34,908 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:34,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-25 17:15:34,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:15:34,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:15:34,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:36,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:38,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384624416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:38,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:38,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2022-11-25 17:15:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407871267] [2022-11-25 17:15:38,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:38,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-25 17:15:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-25 17:15:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=6359, Unknown=0, NotChecked=0, Total=7832 [2022-11-25 17:15:38,391 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:39,994 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-11-25 17:15:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:15:39,994 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 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 77 [2022-11-25 17:15:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:39,995 INFO L225 Difference]: With dead ends: 125 [2022-11-25 17:15:39,995 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 17:15:39,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 85 SyntacticMatches, 18 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5883 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2962, Invalid=8594, Unknown=0, NotChecked=0, Total=11556 [2022-11-25 17:15:39,997 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 336 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:39,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 88 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:15:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 17:15:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-11-25 17:15:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-11-25 17:15:40,105 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 77 [2022-11-25 17:15:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:40,105 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-11-25 17:15:40,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-11-25 17:15:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 17:15:40,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:40,106 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:40,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:40,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:40,312 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1531329855, now seen corresponding path program 29 times [2022-11-25 17:15:40,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:40,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123601277] [2022-11-25 17:15:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:40,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:41,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:41,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123601277] [2022-11-25 17:15:41,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123601277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:41,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773211342] [2022-11-25 17:15:41,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:15:41,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:41,770 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:41,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-25 17:15:41,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-11-25 17:15:41,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:15:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:43,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:45,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773211342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:45,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:45,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 96 [2022-11-25 17:15:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080535697] [2022-11-25 17:15:45,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:45,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-25 17:15:45,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:45,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-25 17:15:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 17:15:45,801 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:49,951 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2022-11-25 17:15:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:15:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-25 17:15:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:49,954 INFO L225 Difference]: With dead ends: 213 [2022-11-25 17:15:49,954 INFO L226 Difference]: Without dead ends: 168 [2022-11-25 17:15:49,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 83 SyntacticMatches, 19 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7002 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2789, Invalid=11491, Unknown=0, NotChecked=0, Total=14280 [2022-11-25 17:15:49,955 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 172 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:49,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 176 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:15:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-25 17:15:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2022-11-25 17:15:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-11-25 17:15:50,023 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 79 [2022-11-25 17:15:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:50,023 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-11-25 17:15:50,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-11-25 17:15:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 17:15:50,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:50,025 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:50,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:50,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:50,225 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1285030403, now seen corresponding path program 29 times [2022-11-25 17:15:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914008350] [2022-11-25 17:15:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:50,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:51,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914008350] [2022-11-25 17:15:51,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914008350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108419399] [2022-11-25 17:15:51,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:15:51,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:51,832 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:51,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-25 17:15:51,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-11-25 17:15:51,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:51,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:15:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:53,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108419399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:55,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:55,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 95 [2022-11-25 17:15:55,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114601494] [2022-11-25 17:15:55,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:55,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-25 17:15:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-25 17:15:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2022-11-25 17:15:55,615 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:57,528 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-11-25 17:15:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 17:15:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-25 17:15:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:57,529 INFO L225 Difference]: With dead ends: 143 [2022-11-25 17:15:57,529 INFO L226 Difference]: Without dead ends: 137 [2022-11-25 17:15:57,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 84 SyntacticMatches, 19 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3391, Invalid=10181, Unknown=0, NotChecked=0, Total=13572 [2022-11-25 17:15:57,531 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 383 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 105 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:15:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-25 17:15:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 122. [2022-11-25 17:15:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-11-25 17:15:57,611 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 79 [2022-11-25 17:15:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:57,612 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-11-25 17:15:57,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-11-25 17:15:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 17:15:57,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:57,613 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:57,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:57,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:57,821 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:15:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash -209538465, now seen corresponding path program 30 times [2022-11-25 17:15:57,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:57,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314008294] [2022-11-25 17:15:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:57,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 258 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:59,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314008294] [2022-11-25 17:15:59,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314008294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575036369] [2022-11-25 17:15:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:15:59,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:59,339 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:59,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-25 17:15:59,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-11-25 17:15:59,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:59,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:15:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:01,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575036369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:03,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:03,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2022-11-25 17:16:03,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155219011] [2022-11-25 17:16:03,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:03,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-25 17:16:03,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-25 17:16:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1624, Invalid=7118, Unknown=0, NotChecked=0, Total=8742 [2022-11-25 17:16:03,563 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:06,206 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2022-11-25 17:16:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:16:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-25 17:16:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:06,208 INFO L225 Difference]: With dead ends: 167 [2022-11-25 17:16:06,208 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 17:16:06,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 89 SyntacticMatches, 19 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6683 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2664, Invalid=10446, Unknown=0, NotChecked=0, Total=13110 [2022-11-25 17:16:06,209 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:06,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 128 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:16:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 17:16:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-11-25 17:16:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-11-25 17:16:06,278 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 81 [2022-11-25 17:16:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:06,278 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-11-25 17:16:06,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-11-25 17:16:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 17:16:06,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:06,279 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:06,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:06,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-25 17:16:06,480 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1016708415, now seen corresponding path program 30 times [2022-11-25 17:16:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408539668] [2022-11-25 17:16:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 225 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:08,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408539668] [2022-11-25 17:16:08,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408539668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173286050] [2022-11-25 17:16:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:16:08,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:08,116 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:08,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-25 17:16:08,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-11-25 17:16:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:16:08,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:10,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173286050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:12,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:12,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 94 [2022-11-25 17:16:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526794351] [2022-11-25 17:16:12,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:12,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-25 17:16:12,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-25 17:16:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=7102, Unknown=0, NotChecked=0, Total=8742 [2022-11-25 17:16:12,093 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:13,787 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-11-25 17:16:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 17:16:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 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 81 [2022-11-25 17:16:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:13,788 INFO L225 Difference]: With dead ends: 131 [2022-11-25 17:16:13,788 INFO L226 Difference]: Without dead ends: 125 [2022-11-25 17:16:13,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 89 SyntacticMatches, 19 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6599 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3297, Invalid=9585, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 17:16:13,789 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 445 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:13,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 70 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:16:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-25 17:16:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-25 17:16:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-11-25 17:16:13,853 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 81 [2022-11-25 17:16:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:13,853 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-11-25 17:16:13,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0319148936170213) internal successors, (191), 94 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-11-25 17:16:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 17:16:13,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:13,854 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:13,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-11-25 17:16:14,055 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1919852127, now seen corresponding path program 31 times [2022-11-25 17:16:14,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:14,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739479981] [2022-11-25 17:16:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:15,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739479981] [2022-11-25 17:16:15,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739479981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941620901] [2022-11-25 17:16:15,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:16:15,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:15,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:15,462 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:15,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-25 17:16:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:16:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:17,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:20,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941620901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:20,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:20,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 101 [2022-11-25 17:16:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939280035] [2022-11-25 17:16:20,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-25 17:16:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-25 17:16:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1793, Invalid=8307, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 17:16:20,205 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:24,410 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2022-11-25 17:16:24,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 17:16:24,411 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-25 17:16:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:24,412 INFO L225 Difference]: With dead ends: 223 [2022-11-25 17:16:24,412 INFO L226 Difference]: Without dead ends: 176 [2022-11-25 17:16:24,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 87 SyntacticMatches, 20 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7782 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3072, Invalid=12678, Unknown=0, NotChecked=0, Total=15750 [2022-11-25 17:16:24,414 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 225 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:24,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 117 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:16:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-25 17:16:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2022-11-25 17:16:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-11-25 17:16:24,498 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 83 [2022-11-25 17:16:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:24,498 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-11-25 17:16:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 101 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-11-25 17:16:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 17:16:24,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:24,499 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:24,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:24,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-25 17:16:24,700 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 323880285, now seen corresponding path program 31 times [2022-11-25 17:16:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:24,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078203051] [2022-11-25 17:16:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:26,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078203051] [2022-11-25 17:16:26,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078203051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125048668] [2022-11-25 17:16:26,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:16:26,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:26,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:26,559 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:26,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-25 17:16:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:16:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:28,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:31,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125048668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:31,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:31,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 100 [2022-11-25 17:16:31,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270606809] [2022-11-25 17:16:31,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-25 17:16:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-25 17:16:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1801, Invalid=8099, Unknown=0, NotChecked=0, Total=9900 [2022-11-25 17:16:31,062 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:33,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:33,033 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-11-25 17:16:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 17:16:33,034 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-25 17:16:33,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:33,034 INFO L225 Difference]: With dead ends: 149 [2022-11-25 17:16:33,034 INFO L226 Difference]: Without dead ends: 143 [2022-11-25 17:16:33,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 88 SyntacticMatches, 20 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3748, Invalid=11258, Unknown=0, NotChecked=0, Total=15006 [2022-11-25 17:16:33,036 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 395 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:33,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 119 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:16:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-25 17:16:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2022-11-25 17:16:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-11-25 17:16:33,138 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 83 [2022-11-25 17:16:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:33,138 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-11-25 17:16:33,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-11-25 17:16:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 17:16:33,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:33,139 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:33,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:33,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-25 17:16:33,340 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:33,340 INFO L85 PathProgramCache]: Analyzing trace with hash -234593857, now seen corresponding path program 32 times [2022-11-25 17:16:33,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:33,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976608106] [2022-11-25 17:16:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:33,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 291 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:34,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976608106] [2022-11-25 17:16:34,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976608106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229131464] [2022-11-25 17:16:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:34,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:34,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:34,714 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:34,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-25 17:16:34,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:34,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:34,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:16:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:36,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:39,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229131464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:39,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:39,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2022-11-25 17:16:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789787458] [2022-11-25 17:16:39,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-25 17:16:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-25 17:16:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 17:16:39,087 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:41,751 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-11-25 17:16:41,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 17:16:41,751 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-25 17:16:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:41,752 INFO L225 Difference]: With dead ends: 175 [2022-11-25 17:16:41,752 INFO L226 Difference]: Without dead ends: 128 [2022-11-25 17:16:41,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 93 SyntacticMatches, 20 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7445 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2943, Invalid=11577, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 17:16:41,754 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:41,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 61 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:16:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-25 17:16:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-11-25 17:16:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-11-25 17:16:41,851 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 85 [2022-11-25 17:16:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:41,851 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-11-25 17:16:41,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-11-25 17:16:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 17:16:41,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:41,853 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:41,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:42,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:42,060 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash -405541601, now seen corresponding path program 32 times [2022-11-25 17:16:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578192095] [2022-11-25 17:16:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:42,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 256 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:44,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578192095] [2022-11-25 17:16:44,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578192095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028206373] [2022-11-25 17:16:44,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:44,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:44,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:44,061 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:44,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-25 17:16:44,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:44,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:16:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:46,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:48,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028206373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:48,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:48,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 99 [2022-11-25 17:16:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458096434] [2022-11-25 17:16:48,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:48,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-25 17:16:48,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-25 17:16:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 17:16:48,384 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:49,897 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-11-25 17:16:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 17:16:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-25 17:16:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:49,898 INFO L225 Difference]: With dead ends: 137 [2022-11-25 17:16:49,898 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 17:16:49,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 93 SyntacticMatches, 20 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7356 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3650, Invalid=10630, Unknown=0, NotChecked=0, Total=14280 [2022-11-25 17:16:49,900 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 618 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:49,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 56 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:16:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 17:16:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-11-25 17:16:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-11-25 17:16:49,992 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 85 [2022-11-25 17:16:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:49,992 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-11-25 17:16:49,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-11-25 17:16:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 17:16:49,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:49,993 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:49,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:50,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:50,199 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1392449921, now seen corresponding path program 33 times [2022-11-25 17:16:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911150874] [2022-11-25 17:16:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:51,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:51,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911150874] [2022-11-25 17:16:51,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911150874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:51,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337168311] [2022-11-25 17:16:51,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:16:51,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:51,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:51,900 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:51,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-25 17:16:51,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-25 17:16:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:51,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:16:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:54,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:56,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337168311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:56,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:56,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 106 [2022-11-25 17:16:56,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195911214] [2022-11-25 17:16:56,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:56,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-11-25 17:16:56,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-11-25 17:16:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1976, Invalid=9154, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 17:16:56,807 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:00,896 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2022-11-25 17:17:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 17:17:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 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 87 [2022-11-25 17:17:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:00,898 INFO L225 Difference]: With dead ends: 233 [2022-11-25 17:17:00,898 INFO L226 Difference]: Without dead ends: 184 [2022-11-25 17:17:00,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 91 SyntacticMatches, 21 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8603 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3369, Invalid=13923, Unknown=0, NotChecked=0, Total=17292 [2022-11-25 17:17:00,899 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 167 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:00,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 195 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:17:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-25 17:17:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 132. [2022-11-25 17:17:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-11-25 17:17:00,985 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 87 [2022-11-25 17:17:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:00,985 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-11-25 17:17:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-11-25 17:17:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 17:17:00,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:00,986 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:00,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:01,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:01,190 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash -976091715, now seen corresponding path program 33 times [2022-11-25 17:17:01,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:01,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653772749] [2022-11-25 17:17:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:01,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:03,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653772749] [2022-11-25 17:17:03,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653772749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461253757] [2022-11-25 17:17:03,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:03,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:03,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:03,227 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:03,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-25 17:17:03,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-25 17:17:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:17:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:05,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:07,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461253757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:07,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:07,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 105 [2022-11-25 17:17:07,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346036432] [2022-11-25 17:17:07,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:07,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-25 17:17:07,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-25 17:17:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1985, Invalid=8935, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 17:17:07,938 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:10,018 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-11-25 17:17:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:17:10,018 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 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 87 [2022-11-25 17:17:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:10,019 INFO L225 Difference]: With dead ends: 155 [2022-11-25 17:17:10,019 INFO L226 Difference]: Without dead ends: 149 [2022-11-25 17:17:10,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 92 SyntacticMatches, 21 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8308 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4123, Invalid=12389, Unknown=0, NotChecked=0, Total=16512 [2022-11-25 17:17:10,020 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 407 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:10,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 126 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:17:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-25 17:17:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2022-11-25 17:17:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-11-25 17:17:10,095 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 87 [2022-11-25 17:17:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:10,096 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-11-25 17:17:10,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-11-25 17:17:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-25 17:17:10,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:10,096 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:10,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:10,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:10,297 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 327797279, now seen corresponding path program 34 times [2022-11-25 17:17:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:10,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11066050] [2022-11-25 17:17:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 326 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:11,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11066050] [2022-11-25 17:17:11,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11066050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434657917] [2022-11-25 17:17:11,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:17:11,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:11,741 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:11,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-25 17:17:11,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:17:11,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:11,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:17:11,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:14,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:16,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434657917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:16,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:16,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-11-25 17:17:16,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583924929] [2022-11-25 17:17:16,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:16,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-25 17:17:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:16,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-25 17:17:16,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=8729, Unknown=0, NotChecked=0, Total=10712 [2022-11-25 17:17:16,327 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:19,369 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2022-11-25 17:17:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:17:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 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 89 [2022-11-25 17:17:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:19,370 INFO L225 Difference]: With dead ends: 183 [2022-11-25 17:17:19,370 INFO L226 Difference]: Without dead ends: 134 [2022-11-25 17:17:19,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 97 SyntacticMatches, 21 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8248 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3236, Invalid=12766, Unknown=0, NotChecked=0, Total=16002 [2022-11-25 17:17:19,372 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:19,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 132 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:17:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-25 17:17:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-11-25 17:17:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-11-25 17:17:19,506 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 89 [2022-11-25 17:17:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:19,506 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-11-25 17:17:19,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-11-25 17:17:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-25 17:17:19,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:19,507 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:19,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:19,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-11-25 17:17:19,713 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1777579519, now seen corresponding path program 34 times [2022-11-25 17:17:19,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:19,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628201843] [2022-11-25 17:17:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:19,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 289 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:21,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628201843] [2022-11-25 17:17:21,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628201843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151095383] [2022-11-25 17:17:21,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:17:21,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:21,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:21,731 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:21,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-25 17:17:21,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:17:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:21,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:17:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:24,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:26,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151095383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:26,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:26,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-11-25 17:17:26,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350983158] [2022-11-25 17:17:26,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:26,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-25 17:17:26,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-25 17:17:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2001, Invalid=8711, Unknown=0, NotChecked=0, Total=10712 [2022-11-25 17:17:26,496 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:28,365 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-11-25 17:17:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 17:17:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-25 17:17:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:28,366 INFO L225 Difference]: With dead ends: 143 [2022-11-25 17:17:28,366 INFO L226 Difference]: Without dead ends: 137 [2022-11-25 17:17:28,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 97 SyntacticMatches, 21 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8154 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4021, Invalid=11729, Unknown=0, NotChecked=0, Total=15750 [2022-11-25 17:17:28,367 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 383 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:28,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 89 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:17:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-25 17:17:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-11-25 17:17:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-11-25 17:17:28,447 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 89 [2022-11-25 17:17:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:28,448 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-11-25 17:17:28,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-11-25 17:17:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-25 17:17:28,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:28,449 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:28,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:28,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:28,650 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash -867161503, now seen corresponding path program 35 times [2022-11-25 17:17:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:28,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330965988] [2022-11-25 17:17:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:28,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:30,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:30,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330965988] [2022-11-25 17:17:30,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330965988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:30,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557046137] [2022-11-25 17:17:30,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:17:30,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:30,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:30,295 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:30,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-25 17:17:30,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-25 17:17:30,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:17:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:33,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:35,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557046137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:35,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:35,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 111 [2022-11-25 17:17:35,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498613413] [2022-11-25 17:17:35,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:35,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-25 17:17:35,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-25 17:17:35,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2168, Invalid=10042, Unknown=0, NotChecked=0, Total=12210 [2022-11-25 17:17:35,933 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:40,653 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2022-11-25 17:17:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 17:17:40,653 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-25 17:17:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:40,655 INFO L225 Difference]: With dead ends: 243 [2022-11-25 17:17:40,655 INFO L226 Difference]: Without dead ends: 192 [2022-11-25 17:17:40,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 95 SyntacticMatches, 22 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9465 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3680, Invalid=15226, Unknown=0, NotChecked=0, Total=18906 [2022-11-25 17:17:40,657 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 172 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:40,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 212 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:17:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-25 17:17:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2022-11-25 17:17:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-11-25 17:17:40,739 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 91 [2022-11-25 17:17:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:40,739 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-11-25 17:17:40,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-11-25 17:17:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-25 17:17:40,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:40,740 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:40,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:40,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-11-25 17:17:40,940 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1070153501, now seen corresponding path program 35 times [2022-11-25 17:17:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:40,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203058635] [2022-11-25 17:17:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:40,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203058635] [2022-11-25 17:17:42,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203058635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791147303] [2022-11-25 17:17:42,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:17:42,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:42,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:42,884 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:42,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-25 17:17:42,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-25 17:17:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:17:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:45,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:47,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791147303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:47,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:47,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2022-11-25 17:17:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393797314] [2022-11-25 17:17:47,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:47,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-25 17:17:47,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-25 17:17:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2178, Invalid=9812, Unknown=0, NotChecked=0, Total=11990 [2022-11-25 17:17:47,870 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:50,000 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-11-25 17:17:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:17:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-25 17:17:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:50,000 INFO L225 Difference]: With dead ends: 161 [2022-11-25 17:17:50,000 INFO L226 Difference]: Without dead ends: 155 [2022-11-25 17:17:50,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 96 SyntacticMatches, 22 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9155 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4516, Invalid=13574, Unknown=0, NotChecked=0, Total=18090 [2022-11-25 17:17:50,002 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 313 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:50,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 118 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:17:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-25 17:17:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2022-11-25 17:17:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-11-25 17:17:50,152 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 91 [2022-11-25 17:17:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:50,152 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-11-25 17:17:50,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-11-25 17:17:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 17:17:50,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:50,153 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:50,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:50,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-11-25 17:17:50,354 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:50,354 INFO L85 PathProgramCache]: Analyzing trace with hash -325571713, now seen corresponding path program 36 times [2022-11-25 17:17:50,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:50,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761954837] [2022-11-25 17:17:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:50,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 363 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:52,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761954837] [2022-11-25 17:17:52,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761954837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:52,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389771135] [2022-11-25 17:17:52,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:17:52,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:52,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:52,115 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:52,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-25 17:17:52,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-25 17:17:52,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:52,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:17:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:54,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:57,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389771135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:57,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:57,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2022-11-25 17:17:57,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662727733] [2022-11-25 17:17:57,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:57,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-25 17:17:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-25 17:17:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2176, Invalid=9596, Unknown=0, NotChecked=0, Total=11772 [2022-11-25 17:17:57,154 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:00,541 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2022-11-25 17:18:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 17:18:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-11-25 17:18:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:00,542 INFO L225 Difference]: With dead ends: 191 [2022-11-25 17:18:00,542 INFO L226 Difference]: Without dead ends: 140 [2022-11-25 17:18:00,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 101 SyntacticMatches, 22 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9092 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3543, Invalid=14013, Unknown=0, NotChecked=0, Total=17556 [2022-11-25 17:18:00,543 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:00,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 146 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:18:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-25 17:18:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-11-25 17:18:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-11-25 17:18:00,633 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 93 [2022-11-25 17:18:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:00,633 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-11-25 17:18:00,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-11-25 17:18:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 17:18:00,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:00,634 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:00,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:00,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:00,835 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash -427403297, now seen corresponding path program 36 times [2022-11-25 17:18:00,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:00,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850574808] [2022-11-25 17:18:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 324 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:03,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850574808] [2022-11-25 17:18:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850574808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897217248] [2022-11-25 17:18:03,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:18:03,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:03,038 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:03,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-25 17:18:03,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-25 17:18:03,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:18:03,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:05,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:07,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897217248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:07,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:07,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 109 [2022-11-25 17:18:07,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143278947] [2022-11-25 17:18:07,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:07,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-25 17:18:07,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-25 17:18:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=9577, Unknown=0, NotChecked=0, Total=11772 [2022-11-25 17:18:07,947 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:09,974 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-11-25 17:18:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:18:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 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 93 [2022-11-25 17:18:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:09,976 INFO L225 Difference]: With dead ends: 149 [2022-11-25 17:18:09,976 INFO L226 Difference]: Without dead ends: 143 [2022-11-25 17:18:09,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 101 SyntacticMatches, 22 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8993 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4410, Invalid=12882, Unknown=0, NotChecked=0, Total=17292 [2022-11-25 17:18:09,979 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 341 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:09,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 81 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-25 17:18:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-11-25 17:18:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-11-25 17:18:10,117 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 93 [2022-11-25 17:18:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:10,117 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-11-25 17:18:10,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-11-25 17:18:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 17:18:10,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:10,118 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:10,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:10,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:10,319 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1858196545, now seen corresponding path program 37 times [2022-11-25 17:18:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503597827] [2022-11-25 17:18:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:12,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:12,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503597827] [2022-11-25 17:18:12,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503597827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:12,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710862493] [2022-11-25 17:18:12,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:18:12,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:12,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:12,207 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:12,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-25 17:18:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:18:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:15,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:18,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710862493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:18,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:18,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 116 [2022-11-25 17:18:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306997222] [2022-11-25 17:18:18,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:18,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-25 17:18:18,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:18,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-25 17:18:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=10971, Unknown=0, NotChecked=0, Total=13340 [2022-11-25 17:18:18,118 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:22,758 INFO L93 Difference]: Finished difference Result 253 states and 258 transitions. [2022-11-25 17:18:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:18:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 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 95 [2022-11-25 17:18:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:22,760 INFO L225 Difference]: With dead ends: 253 [2022-11-25 17:18:22,760 INFO L226 Difference]: Without dead ends: 200 [2022-11-25 17:18:22,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 99 SyntacticMatches, 23 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10368 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4005, Invalid=16587, Unknown=0, NotChecked=0, Total=20592 [2022-11-25 17:18:22,761 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:22,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 151 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-25 17:18:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2022-11-25 17:18:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-11-25 17:18:22,886 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 95 [2022-11-25 17:18:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:22,886 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-11-25 17:18:22,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-11-25 17:18:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 17:18:22,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:22,887 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:22,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:23,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-11-25 17:18:23,092 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1375269245, now seen corresponding path program 37 times [2022-11-25 17:18:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:23,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399113932] [2022-11-25 17:18:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:23,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:25,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399113932] [2022-11-25 17:18:25,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399113932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:25,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607280399] [2022-11-25 17:18:25,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:18:25,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:25,200 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:25,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-25 17:18:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:18:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:28,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:30,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607280399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:30,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:30,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 115 [2022-11-25 17:18:30,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578116269] [2022-11-25 17:18:30,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:30,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-25 17:18:30,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:30,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-25 17:18:30,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2380, Invalid=10730, Unknown=0, NotChecked=0, Total=13110 [2022-11-25 17:18:30,615 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:32,952 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2022-11-25 17:18:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 17:18:32,952 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 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 95 [2022-11-25 17:18:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:32,952 INFO L225 Difference]: With dead ends: 167 [2022-11-25 17:18:32,952 INFO L226 Difference]: Without dead ends: 161 [2022-11-25 17:18:32,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 100 SyntacticMatches, 23 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10043 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4927, Invalid=14813, Unknown=0, NotChecked=0, Total=19740 [2022-11-25 17:18:32,954 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 604 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:32,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 85 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-25 17:18:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2022-11-25 17:18:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-11-25 17:18:33,091 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 95 [2022-11-25 17:18:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:33,091 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-11-25 17:18:33,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-11-25 17:18:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-25 17:18:33,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:33,092 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:33,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:33,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:33,293 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 832882143, now seen corresponding path program 38 times [2022-11-25 17:18:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:33,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134734142] [2022-11-25 17:18:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 402 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:35,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134734142] [2022-11-25 17:18:35,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134734142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409425894] [2022-11-25 17:18:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:18:35,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:35,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:35,065 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:35,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-25 17:18:35,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:18:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:18:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:37,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:40,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409425894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:40,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:40,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 114 [2022-11-25 17:18:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875905461] [2022-11-25 17:18:40,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-11-25 17:18:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-11-25 17:18:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2378, Invalid=10504, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 17:18:40,248 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:43,319 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-11-25 17:18:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 17:18:43,319 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 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 97 [2022-11-25 17:18:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:43,320 INFO L225 Difference]: With dead ends: 199 [2022-11-25 17:18:43,320 INFO L226 Difference]: Without dead ends: 146 [2022-11-25 17:18:43,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 105 SyntacticMatches, 23 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9977 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=3864, Invalid=15318, Unknown=0, NotChecked=0, Total=19182 [2022-11-25 17:18:43,322 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:43,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 117 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-25 17:18:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-11-25 17:18:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-11-25 17:18:43,413 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 97 [2022-11-25 17:18:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:43,413 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-11-25 17:18:43,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-11-25 17:18:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-25 17:18:43,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:43,414 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:43,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:43,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:43,614 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash -16182593, now seen corresponding path program 38 times [2022-11-25 17:18:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:43,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391434760] [2022-11-25 17:18:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:43,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 361 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:45,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:45,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391434760] [2022-11-25 17:18:45,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391434760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087531127] [2022-11-25 17:18:45,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:18:45,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:45,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:45,763 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:45,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-25 17:18:45,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:18:45,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:45,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:18:45,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:48,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:50,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087531127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:50,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:50,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 114 [2022-11-25 17:18:50,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468070263] [2022-11-25 17:18:50,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:50,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-11-25 17:18:50,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-11-25 17:18:50,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=10484, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 17:18:50,683 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:52,501 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-11-25 17:18:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:18:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 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 97 [2022-11-25 17:18:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:52,502 INFO L225 Difference]: With dead ends: 155 [2022-11-25 17:18:52,502 INFO L226 Difference]: Without dead ends: 149 [2022-11-25 17:18:52,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 105 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9873 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4817, Invalid=14089, Unknown=0, NotChecked=0, Total=18906 [2022-11-25 17:18:52,504 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 581 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:52,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 49 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:18:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-25 17:18:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-11-25 17:18:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-11-25 17:18:52,619 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 97 [2022-11-25 17:18:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:52,619 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-11-25 17:18:52,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.026315789473684) internal successors, (231), 114 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-11-25 17:18:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 17:18:52,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:52,620 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:52,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:52,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-11-25 17:18:52,821 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:52,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1904301857, now seen corresponding path program 39 times [2022-11-25 17:18:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:52,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695444500] [2022-11-25 17:18:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:52,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:54,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:54,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695444500] [2022-11-25 17:18:54,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695444500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:54,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323147066] [2022-11-25 17:18:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:18:54,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:54,814 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:54,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-25 17:18:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-25 17:18:54,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:54,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 17:18:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:57,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:00,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323147066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:00,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:00,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 121 [2022-11-25 17:19:00,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829678707] [2022-11-25 17:19:00,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:00,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-11-25 17:19:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-11-25 17:19:00,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2579, Invalid=11941, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 17:19:00,494 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:05,328 INFO L93 Difference]: Finished difference Result 263 states and 268 transitions. [2022-11-25 17:19:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 17:19:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 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 99 [2022-11-25 17:19:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:05,330 INFO L225 Difference]: With dead ends: 263 [2022-11-25 17:19:05,330 INFO L226 Difference]: Without dead ends: 208 [2022-11-25 17:19:05,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 103 SyntacticMatches, 24 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11312 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4344, Invalid=18006, Unknown=0, NotChecked=0, Total=22350 [2022-11-25 17:19:05,332 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:05,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 204 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:19:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-25 17:19:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 150. [2022-11-25 17:19:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-11-25 17:19:05,432 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 99 [2022-11-25 17:19:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:05,432 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-11-25 17:19:05,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 121 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-11-25 17:19:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 17:19:05,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:05,433 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:05,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:05,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:05,639 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash -854172451, now seen corresponding path program 39 times [2022-11-25 17:19:05,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:05,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421960296] [2022-11-25 17:19:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:05,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:07,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:07,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421960296] [2022-11-25 17:19:07,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421960296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593434717] [2022-11-25 17:19:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:19:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:07,901 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:07,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-25 17:19:07,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-25 17:19:07,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:07,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 17:19:07,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:10,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:13,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593434717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:13,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:13,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 120 [2022-11-25 17:19:13,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160651657] [2022-11-25 17:19:13,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:13,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-11-25 17:19:13,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-11-25 17:19:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2591, Invalid=11689, Unknown=0, NotChecked=0, Total=14280 [2022-11-25 17:19:13,521 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:15,933 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-11-25 17:19:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:19:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 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 99 [2022-11-25 17:19:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:15,934 INFO L225 Difference]: With dead ends: 173 [2022-11-25 17:19:15,934 INFO L226 Difference]: Without dead ends: 167 [2022-11-25 17:19:15,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 104 SyntacticMatches, 24 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10972 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5356, Invalid=16106, Unknown=0, NotChecked=0, Total=21462 [2022-11-25 17:19:15,935 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 508 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:15,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 71 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:19:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-25 17:19:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 152. [2022-11-25 17:19:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-11-25 17:19:16,050 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 99 [2022-11-25 17:19:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:16,050 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-11-25 17:19:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-11-25 17:19:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 17:19:16,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:16,051 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:16,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:16,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:16,252 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1528092991, now seen corresponding path program 40 times [2022-11-25 17:19:16,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:16,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591900012] [2022-11-25 17:19:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 443 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:18,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:18,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591900012] [2022-11-25 17:19:18,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591900012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:18,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705265673] [2022-11-25 17:19:18,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:19:18,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:18,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:18,165 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:18,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-25 17:19:18,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:19:18,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:19:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:21,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:23,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705265673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:23,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:23,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 119 [2022-11-25 17:19:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344750359] [2022-11-25 17:19:23,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:23,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-25 17:19:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-25 17:19:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2589, Invalid=11453, Unknown=0, NotChecked=0, Total=14042 [2022-11-25 17:19:23,567 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:26,862 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2022-11-25 17:19:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 17:19:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 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 101 [2022-11-25 17:19:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:26,864 INFO L225 Difference]: With dead ends: 207 [2022-11-25 17:19:26,864 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 17:19:26,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 109 SyntacticMatches, 24 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10903 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=4199, Invalid=16681, Unknown=0, NotChecked=0, Total=20880 [2022-11-25 17:19:26,866 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:26,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 120 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:19:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 17:19:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-11-25 17:19:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-11-25 17:19:26,982 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 101 [2022-11-25 17:19:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:26,982 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-11-25 17:19:26,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-11-25 17:19:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 17:19:26,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:26,983 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:26,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:27,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-11-25 17:19:27,184 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -152492385, now seen corresponding path program 40 times [2022-11-25 17:19:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569907920] [2022-11-25 17:19:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 400 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:29,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:29,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569907920] [2022-11-25 17:19:29,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569907920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:29,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018223334] [2022-11-25 17:19:29,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:19:29,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:29,334 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:29,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-25 17:19:29,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:19:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:19:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:31,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:34,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018223334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:34,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:34,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 119 [2022-11-25 17:19:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889486307] [2022-11-25 17:19:34,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-25 17:19:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-25 17:19:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2610, Invalid=11432, Unknown=0, NotChecked=0, Total=14042 [2022-11-25 17:19:34,427 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:36,409 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-11-25 17:19:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 17:19:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 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 101 [2022-11-25 17:19:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:36,410 INFO L225 Difference]: With dead ends: 161 [2022-11-25 17:19:36,410 INFO L226 Difference]: Without dead ends: 155 [2022-11-25 17:19:36,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 109 SyntacticMatches, 24 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10794 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5242, Invalid=15350, Unknown=0, NotChecked=0, Total=20592 [2022-11-25 17:19:36,412 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 363 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:36,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 55 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:19:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-25 17:19:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2022-11-25 17:19:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-11-25 17:19:36,523 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 101 [2022-11-25 17:19:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:36,523 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-11-25 17:19:36,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-11-25 17:19:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 17:19:36,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:36,524 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:36,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-25 17:19:36,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:36,730 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -240389375, now seen corresponding path program 41 times [2022-11-25 17:19:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799518169] [2022-11-25 17:19:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:36,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:38,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799518169] [2022-11-25 17:19:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799518169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978949025] [2022-11-25 17:19:38,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:19:38,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:38,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:38,611 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:38,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-25 17:19:38,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-11-25 17:19:38,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 17:19:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:41,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:44,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978949025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:44,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:44,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 126 [2022-11-25 17:19:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716198537] [2022-11-25 17:19:44,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-11-25 17:19:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-11-25 17:19:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2798, Invalid=12952, Unknown=0, NotChecked=0, Total=15750 [2022-11-25 17:19:44,345 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:49,057 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2022-11-25 17:19:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 17:19:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 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 103 [2022-11-25 17:19:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:49,059 INFO L225 Difference]: With dead ends: 273 [2022-11-25 17:19:49,059 INFO L226 Difference]: Without dead ends: 216 [2022-11-25 17:19:49,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 107 SyntacticMatches, 25 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12297 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4697, Invalid=19483, Unknown=0, NotChecked=0, Total=24180 [2022-11-25 17:19:49,061 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 200 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:49,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 173 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:19:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-25 17:19:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2022-11-25 17:19:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-11-25 17:19:49,166 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 103 [2022-11-25 17:19:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:49,166 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-11-25 17:19:49,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-11-25 17:19:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 17:19:49,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:49,167 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:49,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:49,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:49,368 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:49,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:49,368 INFO L85 PathProgramCache]: Analyzing trace with hash 633782589, now seen corresponding path program 41 times [2022-11-25 17:19:49,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:49,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010117749] [2022-11-25 17:19:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:49,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010117749] [2022-11-25 17:19:51,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010117749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266234867] [2022-11-25 17:19:51,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:19:51,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:51,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:51,638 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:51,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-25 17:19:51,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-11-25 17:19:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 17:19:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:54,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:57,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266234867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:57,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:57,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 125 [2022-11-25 17:19:57,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541508689] [2022-11-25 17:19:57,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:57,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-11-25 17:19:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-11-25 17:19:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=12689, Unknown=0, NotChecked=0, Total=15500 [2022-11-25 17:19:57,178 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:59,523 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-11-25 17:19:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 17:19:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 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 103 [2022-11-25 17:19:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:59,524 INFO L225 Difference]: With dead ends: 179 [2022-11-25 17:19:59,524 INFO L226 Difference]: Without dead ends: 173 [2022-11-25 17:19:59,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 108 SyntacticMatches, 25 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11942 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5803, Invalid=17453, Unknown=0, NotChecked=0, Total=23256 [2022-11-25 17:19:59,525 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 528 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:59,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 79 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:19:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-25 17:19:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 158. [2022-11-25 17:19:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-11-25 17:19:59,636 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 103 [2022-11-25 17:19:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:59,636 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-11-25 17:19:59,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-11-25 17:19:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-25 17:19:59,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:59,637 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:59,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:59,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-11-25 17:19:59,837 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1228776863, now seen corresponding path program 42 times [2022-11-25 17:19:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:59,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218044011] [2022-11-25 17:19:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 486 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:01,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218044011] [2022-11-25 17:20:01,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218044011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224380440] [2022-11-25 17:20:01,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:20:01,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:01,673 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:01,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-25 17:20:01,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-11-25 17:20:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:01,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 17:20:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:04,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:07,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224380440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:07,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:07,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 124 [2022-11-25 17:20:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357399896] [2022-11-25 17:20:07,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-25 17:20:07,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:07,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-25 17:20:07,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2809, Invalid=12443, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 17:20:07,274 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:20:10,755 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2022-11-25 17:20:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:20:10,756 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 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 105 [2022-11-25 17:20:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:20:10,756 INFO L225 Difference]: With dead ends: 215 [2022-11-25 17:20:10,757 INFO L226 Difference]: Without dead ends: 158 [2022-11-25 17:20:10,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 113 SyntacticMatches, 25 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11870 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=4548, Invalid=18102, Unknown=0, NotChecked=0, Total=22650 [2022-11-25 17:20:10,762 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:20:10,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 126 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:20:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-25 17:20:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-11-25 17:20:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-11-25 17:20:10,944 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 105 [2022-11-25 17:20:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:20:10,945 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-11-25 17:20:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-11-25 17:20:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-25 17:20:10,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:20:10,946 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:10,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:11,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-11-25 17:20:11,151 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:20:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash -679226497, now seen corresponding path program 42 times [2022-11-25 17:20:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:11,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477054306] [2022-11-25 17:20:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 441 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:13,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477054306] [2022-11-25 17:20:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477054306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:13,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900515645] [2022-11-25 17:20:13,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:20:13,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:13,466 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:13,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-25 17:20:13,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-11-25 17:20:13,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 17:20:13,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:16,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:18,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900515645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:18,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:18,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 124 [2022-11-25 17:20:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96488286] [2022-11-25 17:20:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:18,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-25 17:20:18,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-25 17:20:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2831, Invalid=12421, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 17:20:18,978 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:20:21,201 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2022-11-25 17:20:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:20:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 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 105 [2022-11-25 17:20:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:20:21,203 INFO L225 Difference]: With dead ends: 167 [2022-11-25 17:20:21,203 INFO L226 Difference]: Without dead ends: 161 [2022-11-25 17:20:21,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 113 SyntacticMatches, 25 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11756 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5685, Invalid=16665, Unknown=0, NotChecked=0, Total=22350 [2022-11-25 17:20:21,204 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 563 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:20:21,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 78 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:20:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-25 17:20:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-11-25 17:20:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-11-25 17:20:21,316 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 105 [2022-11-25 17:20:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:20:21,317 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-11-25 17:20:21,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.024193548387097) internal successors, (251), 124 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-11-25 17:20:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-25 17:20:21,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:20:21,318 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:21,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-25 17:20:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:21,523 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:20:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 374269921, now seen corresponding path program 43 times [2022-11-25 17:20:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:21,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573582302] [2022-11-25 17:20:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:23,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573582302] [2022-11-25 17:20:23,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573582302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827870072] [2022-11-25 17:20:23,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:20:23,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:23,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:23,516 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:23,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-25 17:20:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:20:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:26,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:29,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827870072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:29,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:29,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 131 [2022-11-25 17:20:29,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361064044] [2022-11-25 17:20:29,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-25 17:20:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-25 17:20:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=14004, Unknown=0, NotChecked=0, Total=17030 [2022-11-25 17:20:29,720 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:20:34,833 INFO L93 Difference]: Finished difference Result 283 states and 288 transitions. [2022-11-25 17:20:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-25 17:20:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-11-25 17:20:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:20:34,835 INFO L225 Difference]: With dead ends: 283 [2022-11-25 17:20:34,835 INFO L226 Difference]: Without dead ends: 224 [2022-11-25 17:20:34,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 111 SyntacticMatches, 26 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13323 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=5064, Invalid=21018, Unknown=0, NotChecked=0, Total=26082 [2022-11-25 17:20:34,838 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 181 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:20:34,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 163 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:20:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-25 17:20:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2022-11-25 17:20:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-11-25 17:20:34,944 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 107 [2022-11-25 17:20:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:20:34,944 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-11-25 17:20:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 131 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-11-25 17:20:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-25 17:20:34,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:20:34,945 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:34,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:35,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:35,146 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:20:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash 413097629, now seen corresponding path program 43 times [2022-11-25 17:20:35,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:35,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265952026] [2022-11-25 17:20:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:35,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265952026] [2022-11-25 17:20:37,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265952026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711217338] [2022-11-25 17:20:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:20:37,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:37,586 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:37,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-25 17:20:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:20:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:40,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:43,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711217338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:43,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:43,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 130 [2022-11-25 17:20:43,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910887987] [2022-11-25 17:20:43,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-25 17:20:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-25 17:20:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3040, Invalid=13730, Unknown=0, NotChecked=0, Total=16770 [2022-11-25 17:20:43,508 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:20:46,153 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-11-25 17:20:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-25 17:20:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-11-25 17:20:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:20:46,154 INFO L225 Difference]: With dead ends: 185 [2022-11-25 17:20:46,154 INFO L226 Difference]: Without dead ends: 179 [2022-11-25 17:20:46,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 112 SyntacticMatches, 26 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12953 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=6268, Invalid=18854, Unknown=0, NotChecked=0, Total=25122 [2022-11-25 17:20:46,156 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 480 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:20:46,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 113 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:20:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-25 17:20:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2022-11-25 17:20:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-11-25 17:20:46,278 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 107 [2022-11-25 17:20:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:20:46,278 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-11-25 17:20:46,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-11-25 17:20:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 17:20:46,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:20:46,279 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:46,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-11-25 17:20:46,479 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:20:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -396072193, now seen corresponding path program 44 times [2022-11-25 17:20:46,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:46,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369394290] [2022-11-25 17:20:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:46,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 531 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369394290] [2022-11-25 17:20:48,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369394290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328117734] [2022-11-25 17:20:48,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:20:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:48,409 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:48,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-25 17:20:48,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:48,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 17:20:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:51,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:54,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328117734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:54,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:54,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 129 [2022-11-25 17:20:54,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302028380] [2022-11-25 17:20:54,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-11-25 17:20:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-11-25 17:20:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3038, Invalid=13474, Unknown=0, NotChecked=0, Total=16512 [2022-11-25 17:20:54,259 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:20:57,901 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-11-25 17:20:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 17:20:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-25 17:20:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:20:57,903 INFO L225 Difference]: With dead ends: 223 [2022-11-25 17:20:57,903 INFO L226 Difference]: Without dead ends: 164 [2022-11-25 17:20:57,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 117 SyntacticMatches, 26 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12878 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=4911, Invalid=19581, Unknown=0, NotChecked=0, Total=24492 [2022-11-25 17:20:57,905 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:20:57,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 110 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:20:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-25 17:20:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-11-25 17:20:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-11-25 17:20:58,021 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 109 [2022-11-25 17:20:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:20:58,021 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-11-25 17:20:58,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-11-25 17:20:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 17:20:58,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:20:58,022 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:58,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:58,222 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:20:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1809426081, now seen corresponding path program 44 times [2022-11-25 17:20:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:58,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227500763] [2022-11-25 17:20:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:58,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 484 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:00,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:00,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227500763] [2022-11-25 17:21:00,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227500763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:00,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770103116] [2022-11-25 17:21:00,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:21:00,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:00,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:00,636 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:00,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-25 17:21:00,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:21:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 17:21:00,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:03,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:06,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770103116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:06,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:06,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 129 [2022-11-25 17:21:06,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606418645] [2022-11-25 17:21:06,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:06,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-11-25 17:21:06,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-11-25 17:21:06,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3061, Invalid=13451, Unknown=0, NotChecked=0, Total=16512 [2022-11-25 17:21:06,500 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:21:08,776 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-11-25 17:21:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 17:21:08,776 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 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 109 [2022-11-25 17:21:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:21:08,777 INFO L225 Difference]: With dead ends: 173 [2022-11-25 17:21:08,777 INFO L226 Difference]: Without dead ends: 167 [2022-11-25 17:21:08,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 117 SyntacticMatches, 26 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12759 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6146, Invalid=18034, Unknown=0, NotChecked=0, Total=24180 [2022-11-25 17:21:08,779 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 574 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:21:08,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 78 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:21:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-25 17:21:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-11-25 17:21:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-11-25 17:21:08,909 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 109 [2022-11-25 17:21:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:21:08,909 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-11-25 17:21:08,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0232558139534884) internal successors, (261), 129 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-11-25 17:21:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 17:21:08,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:21:08,910 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:08,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:09,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:09,114 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:21:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash 879195585, now seen corresponding path program 45 times [2022-11-25 17:21:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:09,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064940998] [2022-11-25 17:21:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:11,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064940998] [2022-11-25 17:21:11,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064940998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006898507] [2022-11-25 17:21:11,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:21:11,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:11,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:11,277 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:11,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-25 17:21:11,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-11-25 17:21:11,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-25 17:21:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:14,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:17,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006898507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:17,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:17,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 136 [2022-11-25 17:21:17,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723382090] [2022-11-25 17:21:17,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:17,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-11-25 17:21:17,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-11-25 17:21:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3263, Invalid=15097, Unknown=0, NotChecked=0, Total=18360 [2022-11-25 17:21:17,867 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:21:23,740 INFO L93 Difference]: Finished difference Result 293 states and 298 transitions. [2022-11-25 17:21:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:21:23,741 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-11-25 17:21:23,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:21:23,742 INFO L225 Difference]: With dead ends: 293 [2022-11-25 17:21:23,742 INFO L226 Difference]: Without dead ends: 232 [2022-11-25 17:21:23,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 115 SyntacticMatches, 27 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14390 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=5445, Invalid=22611, Unknown=0, NotChecked=0, Total=28056 [2022-11-25 17:21:23,744 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 155 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:21:23,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 194 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:21:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-25 17:21:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2022-11-25 17:21:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-11-25 17:21:23,854 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 111 [2022-11-25 17:21:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:21:23,854 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-11-25 17:21:23,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-11-25 17:21:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 17:21:23,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:21:23,855 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:23,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:24,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-11-25 17:21:24,056 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:21:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1311077629, now seen corresponding path program 45 times [2022-11-25 17:21:24,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:24,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531129981] [2022-11-25 17:21:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531129981] [2022-11-25 17:21:26,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531129981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398174923] [2022-11-25 17:21:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:21:26,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:26,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:26,643 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:26,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-25 17:21:26,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-11-25 17:21:26,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-25 17:21:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:29,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:32,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398174923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:32,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:32,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 135 [2022-11-25 17:21:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780863341] [2022-11-25 17:21:32,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:32,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-11-25 17:21:32,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-11-25 17:21:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3278, Invalid=14812, Unknown=0, NotChecked=0, Total=18090 [2022-11-25 17:21:32,933 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:21:35,628 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2022-11-25 17:21:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 17:21:35,628 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-11-25 17:21:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:21:35,629 INFO L225 Difference]: With dead ends: 191 [2022-11-25 17:21:35,629 INFO L226 Difference]: Without dead ends: 185 [2022-11-25 17:21:35,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 116 SyntacticMatches, 27 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14005 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=6751, Invalid=20309, Unknown=0, NotChecked=0, Total=27060 [2022-11-25 17:21:35,631 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 696 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:21:35,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 100 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:21:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-25 17:21:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 170. [2022-11-25 17:21:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-11-25 17:21:35,827 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 111 [2022-11-25 17:21:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:21:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-11-25 17:21:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-11-25 17:21:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-25 17:21:35,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:21:35,828 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:35,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:36,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:36,034 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:21:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:36,034 INFO L85 PathProgramCache]: Analyzing trace with hash -725718689, now seen corresponding path program 46 times [2022-11-25 17:21:36,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:36,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450107203] [2022-11-25 17:21:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 578 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450107203] [2022-11-25 17:21:38,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450107203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679271310] [2022-11-25 17:21:38,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:21:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:38,083 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:38,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-25 17:21:38,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:21:38,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:21:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:41,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:44,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679271310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:44,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:44,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 134 [2022-11-25 17:21:44,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366890354] [2022-11-25 17:21:44,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:44,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-11-25 17:21:44,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-11-25 17:21:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3276, Invalid=14546, Unknown=0, NotChecked=0, Total=17822 [2022-11-25 17:21:44,368 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:21:48,162 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2022-11-25 17:21:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 17:21:48,162 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-25 17:21:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:21:48,163 INFO L225 Difference]: With dead ends: 231 [2022-11-25 17:21:48,163 INFO L226 Difference]: Without dead ends: 170 [2022-11-25 17:21:48,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 121 SyntacticMatches, 27 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13927 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=5288, Invalid=21118, Unknown=0, NotChecked=0, Total=26406 [2022-11-25 17:21:48,165 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 131 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:21:48,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 109 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:21:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-25 17:21:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-11-25 17:21:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-11-25 17:21:48,291 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 113 [2022-11-25 17:21:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:21:48,291 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-11-25 17:21:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 134 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-11-25 17:21:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-25 17:21:48,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:21:48,292 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:48,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:48,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-11-25 17:21:48,493 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:21:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 772667455, now seen corresponding path program 46 times [2022-11-25 17:21:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:48,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134417129] [2022-11-25 17:21:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 529 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:51,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:51,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134417129] [2022-11-25 17:21:51,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134417129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:51,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595175023] [2022-11-25 17:21:51,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:21:51,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:51,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:51,078 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:51,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-25 17:21:51,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:21:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:21:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:54,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:57,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595175023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:57,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:57,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 134 [2022-11-25 17:21:57,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034219529] [2022-11-25 17:21:57,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:57,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-11-25 17:21:57,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-11-25 17:21:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3300, Invalid=14522, Unknown=0, NotChecked=0, Total=17822 [2022-11-25 17:21:57,278 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:21:59,825 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-11-25 17:21:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-25 17:21:59,826 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-25 17:21:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:21:59,827 INFO L225 Difference]: With dead ends: 179 [2022-11-25 17:21:59,827 INFO L226 Difference]: Without dead ends: 173 [2022-11-25 17:21:59,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 121 SyntacticMatches, 27 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13803 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=6625, Invalid=19457, Unknown=0, NotChecked=0, Total=26082 [2022-11-25 17:21:59,828 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 529 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:21:59,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 88 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:21:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-25 17:21:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-11-25 17:21:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-11-25 17:21:59,954 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 113 [2022-11-25 17:21:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:21:59,954 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-11-25 17:21:59,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-11-25 17:21:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-25 17:21:59,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:21:59,955 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:59,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:00,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-11-25 17:22:00,156 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash -220013407, now seen corresponding path program 47 times [2022-11-25 17:22:00,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:00,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695984138] [2022-11-25 17:22:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:00,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:02,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695984138] [2022-11-25 17:22:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695984138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75061658] [2022-11-25 17:22:02,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:22:02,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:02,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:02,416 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:02,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-25 17:22:02,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-11-25 17:22:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 17:22:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:06,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:09,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75061658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:09,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:09,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 141 [2022-11-25 17:22:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865226398] [2022-11-25 17:22:09,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-11-25 17:22:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-11-25 17:22:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3509, Invalid=16231, Unknown=0, NotChecked=0, Total=19740 [2022-11-25 17:22:09,401 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:22:15,231 INFO L93 Difference]: Finished difference Result 303 states and 308 transitions. [2022-11-25 17:22:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-25 17:22:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-25 17:22:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:22:15,233 INFO L225 Difference]: With dead ends: 303 [2022-11-25 17:22:15,233 INFO L226 Difference]: Without dead ends: 240 [2022-11-25 17:22:15,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 119 SyntacticMatches, 28 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15498 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=5840, Invalid=24262, Unknown=0, NotChecked=0, Total=30102 [2022-11-25 17:22:15,236 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 144 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:22:15,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 218 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:22:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-25 17:22:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 174. [2022-11-25 17:22:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-11-25 17:22:15,382 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 115 [2022-11-25 17:22:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:22:15,382 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-11-25 17:22:15,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 141 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-11-25 17:22:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-25 17:22:15,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:22:15,383 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:15,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:15,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:15,584 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash -20036515, now seen corresponding path program 47 times [2022-11-25 17:22:15,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535819285] [2022-11-25 17:22:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:15,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535819285] [2022-11-25 17:22:18,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535819285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643336392] [2022-11-25 17:22:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:22:18,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:18,442 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:18,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-25 17:22:18,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-11-25 17:22:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 17:22:18,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:22,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:25,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643336392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:25,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:25,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 140 [2022-11-25 17:22:25,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711979567] [2022-11-25 17:22:25,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:25,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-11-25 17:22:25,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-11-25 17:22:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3525, Invalid=15935, Unknown=0, NotChecked=0, Total=19460 [2022-11-25 17:22:25,395 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:22:28,433 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2022-11-25 17:22:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 17:22:28,433 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-25 17:22:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:22:28,434 INFO L225 Difference]: With dead ends: 197 [2022-11-25 17:22:28,434 INFO L226 Difference]: Without dead ends: 191 [2022-11-25 17:22:28,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 120 SyntacticMatches, 28 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15098 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=7252, Invalid=21818, Unknown=0, NotChecked=0, Total=29070 [2022-11-25 17:22:28,437 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 369 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:22:28,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 110 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:22:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-25 17:22:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 176. [2022-11-25 17:22:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-11-25 17:22:28,593 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 115 [2022-11-25 17:22:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:22:28,593 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-11-25 17:22:28,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-11-25 17:22:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-25 17:22:28,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:22:28,594 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:28,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-11-25 17:22:28,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:28,794 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -26156865, now seen corresponding path program 48 times [2022-11-25 17:22:28,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046340518] [2022-11-25 17:22:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:28,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 627 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:31,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046340518] [2022-11-25 17:22:31,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046340518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097555493] [2022-11-25 17:22:31,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:22:31,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:31,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:31,058 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:31,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-25 17:22:31,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-11-25 17:22:31,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:31,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 17:22:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:34,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:37,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097555493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:37,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:37,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 139 [2022-11-25 17:22:37,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580166597] [2022-11-25 17:22:37,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:37,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-25 17:22:37,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-25 17:22:37,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3523, Invalid=15659, Unknown=0, NotChecked=0, Total=19182 [2022-11-25 17:22:37,918 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:22:42,192 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2022-11-25 17:22:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-25 17:22:42,192 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-25 17:22:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:22:42,193 INFO L225 Difference]: With dead ends: 239 [2022-11-25 17:22:42,193 INFO L226 Difference]: Without dead ends: 176 [2022-11-25 17:22:42,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 125 SyntacticMatches, 28 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15017 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=5679, Invalid=22713, Unknown=0, NotChecked=0, Total=28392 [2022-11-25 17:22:42,195 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:22:42,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 153 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:22:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-25 17:22:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-11-25 17:22:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-11-25 17:22:42,328 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 117 [2022-11-25 17:22:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:22:42,328 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-11-25 17:22:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 139 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-11-25 17:22:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-25 17:22:42,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:22:42,330 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:42,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:42,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-11-25 17:22:42,534 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -664276961, now seen corresponding path program 48 times [2022-11-25 17:22:42,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:42,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157978616] [2022-11-25 17:22:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 576 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:45,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:45,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157978616] [2022-11-25 17:22:45,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157978616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:45,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279033841] [2022-11-25 17:22:45,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:22:45,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:45,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:45,472 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:45,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-25 17:22:45,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-11-25 17:22:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 17:22:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:48,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:52,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279033841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:52,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:52,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 139 [2022-11-25 17:22:52,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556830347] [2022-11-25 17:22:52,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-25 17:22:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-25 17:22:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3548, Invalid=15634, Unknown=0, NotChecked=0, Total=19182 [2022-11-25 17:22:52,243 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:22:54,926 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-11-25 17:22:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 17:22:54,926 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-25 17:22:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:22:54,927 INFO L225 Difference]: With dead ends: 185 [2022-11-25 17:22:54,927 INFO L226 Difference]: Without dead ends: 179 [2022-11-25 17:22:54,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 125 SyntacticMatches, 28 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14888 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=7122, Invalid=20934, Unknown=0, NotChecked=0, Total=28056 [2022-11-25 17:22:54,929 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 539 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:22:54,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 73 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:22:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-25 17:22:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2022-11-25 17:22:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-11-25 17:22:55,063 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 117 [2022-11-25 17:22:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:22:55,063 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-11-25 17:22:55,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-11-25 17:22:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-25 17:22:55,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:22:55,064 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:55,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:55,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-11-25 17:22:55,265 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1855872129, now seen corresponding path program 49 times [2022-11-25 17:22:55,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:55,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461769769] [2022-11-25 17:22:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:55,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:57,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461769769] [2022-11-25 17:22:57,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461769769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862069143] [2022-11-25 17:22:57,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:22:57,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:57,658 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:57,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-25 17:22:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-25 17:22:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:01,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:05,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862069143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:05,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:05,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 146 [2022-11-25 17:23:05,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278739441] [2022-11-25 17:23:05,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:05,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-11-25 17:23:05,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-11-25 17:23:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3764, Invalid=17406, Unknown=0, NotChecked=0, Total=21170 [2022-11-25 17:23:05,075 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:11,222 INFO L93 Difference]: Finished difference Result 313 states and 318 transitions. [2022-11-25 17:23:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 17:23:11,223 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 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 119 [2022-11-25 17:23:11,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:11,223 INFO L225 Difference]: With dead ends: 313 [2022-11-25 17:23:11,223 INFO L226 Difference]: Without dead ends: 248 [2022-11-25 17:23:11,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 123 SyntacticMatches, 29 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16647 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=6249, Invalid=25971, Unknown=0, NotChecked=0, Total=32220 [2022-11-25 17:23:11,227 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 233 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:11,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 115 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:23:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-25 17:23:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 180. [2022-11-25 17:23:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-11-25 17:23:11,408 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 119 [2022-11-25 17:23:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:11,408 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-11-25 17:23:11,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-11-25 17:23:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-25 17:23:11,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:11,409 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:11,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:11,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-11-25 17:23:11,609 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1761669955, now seen corresponding path program 49 times [2022-11-25 17:23:11,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:11,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85402007] [2022-11-25 17:23:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:11,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:14,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85402007] [2022-11-25 17:23:14,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85402007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:14,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127460038] [2022-11-25 17:23:14,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:23:14,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:14,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:14,631 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:14,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-25 17:23:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-25 17:23:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:18,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:22,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127460038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:22,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:22,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 145 [2022-11-25 17:23:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072550705] [2022-11-25 17:23:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-25 17:23:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-25 17:23:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=17099, Unknown=0, NotChecked=0, Total=20880 [2022-11-25 17:23:22,008 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:25,448 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2022-11-25 17:23:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 17:23:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 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 119 [2022-11-25 17:23:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:25,449 INFO L225 Difference]: With dead ends: 203 [2022-11-25 17:23:25,449 INFO L226 Difference]: Without dead ends: 197 [2022-11-25 17:23:25,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 124 SyntacticMatches, 29 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16232 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=7771, Invalid=23381, Unknown=0, NotChecked=0, Total=31152 [2022-11-25 17:23:25,451 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:25,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 181 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 17:23:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-25 17:23:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2022-11-25 17:23:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-11-25 17:23:25,617 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 119 [2022-11-25 17:23:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:25,617 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-11-25 17:23:25,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.993103448275862) internal successors, (289), 145 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-11-25 17:23:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 17:23:25,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:25,618 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:25,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:25,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-11-25 17:23:25,822 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1301352735, now seen corresponding path program 50 times [2022-11-25 17:23:25,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:25,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785724804] [2022-11-25 17:23:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:25,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 678 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785724804] [2022-11-25 17:23:28,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785724804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708670251] [2022-11-25 17:23:28,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:23:28,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:28,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:28,244 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:28,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-25 17:23:28,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:28,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-25 17:23:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:32,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:35,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708670251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:35,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:35,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 144 [2022-11-25 17:23:35,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329039143] [2022-11-25 17:23:35,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:35,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-11-25 17:23:35,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-11-25 17:23:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3779, Invalid=16813, Unknown=0, NotChecked=0, Total=20592 [2022-11-25 17:23:35,601 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:39,854 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2022-11-25 17:23:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:23:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 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 121 [2022-11-25 17:23:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:39,855 INFO L225 Difference]: With dead ends: 247 [2022-11-25 17:23:39,855 INFO L226 Difference]: Without dead ends: 182 [2022-11-25 17:23:39,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 129 SyntacticMatches, 29 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16148 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=6084, Invalid=24366, Unknown=0, NotChecked=0, Total=30450 [2022-11-25 17:23:39,857 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 99 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:39,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 99 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:23:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-25 17:23:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-11-25 17:23:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-11-25 17:23:39,988 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 121 [2022-11-25 17:23:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:39,988 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-11-25 17:23:39,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0069444444444446) internal successors, (289), 144 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-11-25 17:23:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 17:23:39,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:39,989 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:39,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-25 17:23:40,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-11-25 17:23:40,194 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:40,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash 475103487, now seen corresponding path program 50 times [2022-11-25 17:23:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:40,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907366709] [2022-11-25 17:23:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:40,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 625 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:43,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907366709] [2022-11-25 17:23:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907366709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:43,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773162543] [2022-11-25 17:23:43,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:23:43,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:43,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:43,211 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:43,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-25 17:23:43,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:43,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-25 17:23:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:46,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:50,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773162543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:50,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:50,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 144 [2022-11-25 17:23:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143434616] [2022-11-25 17:23:50,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-11-25 17:23:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-11-25 17:23:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3805, Invalid=16787, Unknown=0, NotChecked=0, Total=20592 [2022-11-25 17:23:50,396 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:53,215 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2022-11-25 17:23:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 17:23:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 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 121 [2022-11-25 17:23:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:53,216 INFO L225 Difference]: With dead ends: 191 [2022-11-25 17:23:53,216 INFO L226 Difference]: Without dead ends: 185 [2022-11-25 17:23:53,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 129 SyntacticMatches, 29 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16014 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=7637, Invalid=22465, Unknown=0, NotChecked=0, Total=30102 [2022-11-25 17:23:53,219 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 425 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:53,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 60 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:23:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-25 17:23:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-11-25 17:23:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-11-25 17:23:53,379 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 121 [2022-11-25 17:23:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:53,379 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-11-25 17:23:53,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0208333333333335) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-11-25 17:23:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 17:23:53,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:53,380 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:53,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-11-25 17:23:53,580 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1583822177, now seen corresponding path program 51 times [2022-11-25 17:23:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:53,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001636546] [2022-11-25 17:23:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:56,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001636546] [2022-11-25 17:23:56,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001636546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312822276] [2022-11-25 17:23:56,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:23:56,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:56,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:56,161 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:56,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-25 17:23:56,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-11-25 17:23:56,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:56,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 17:23:56,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:00,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:04,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312822276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:04,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:24:04,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 151 [2022-11-25 17:24:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858129775] [2022-11-25 17:24:04,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-11-25 17:24:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-11-25 17:24:04,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4028, Invalid=18622, Unknown=0, NotChecked=0, Total=22650 [2022-11-25 17:24:04,235 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:10,726 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2022-11-25 17:24:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-25 17:24:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-25 17:24:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:10,727 INFO L225 Difference]: With dead ends: 323 [2022-11-25 17:24:10,727 INFO L226 Difference]: Without dead ends: 256 [2022-11-25 17:24:10,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 127 SyntacticMatches, 30 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17837 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=6672, Invalid=27738, Unknown=0, NotChecked=0, Total=34410 [2022-11-25 17:24:10,730 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:10,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 191 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:24:10,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-25 17:24:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 186. [2022-11-25 17:24:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-11-25 17:24:10,867 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 123 [2022-11-25 17:24:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:10,867 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-11-25 17:24:10,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-11-25 17:24:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 17:24:10,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:10,868 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:10,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:11,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:11,068 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:24:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1527582237, now seen corresponding path program 51 times [2022-11-25 17:24:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:11,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825680442] [2022-11-25 17:24:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:14,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:14,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825680442] [2022-11-25 17:24:14,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825680442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:14,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128484008] [2022-11-25 17:24:14,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:24:14,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:14,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:14,262 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:14,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-25 17:24:14,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-11-25 17:24:14,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:14,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 17:24:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:18,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:22,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128484008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:22,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:24:22,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 150 [2022-11-25 17:24:22,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720269003] [2022-11-25 17:24:22,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:22,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-25 17:24:22,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-25 17:24:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4046, Invalid=18304, Unknown=0, NotChecked=0, Total=22350 [2022-11-25 17:24:22,030 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:25,292 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2022-11-25 17:24:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 17:24:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-25 17:24:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:25,293 INFO L225 Difference]: With dead ends: 209 [2022-11-25 17:24:25,293 INFO L226 Difference]: Without dead ends: 203 [2022-11-25 17:24:25,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 128 SyntacticMatches, 30 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17407 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=8308, Invalid=24998, Unknown=0, NotChecked=0, Total=33306 [2022-11-25 17:24:25,295 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1181 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:25,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 116 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:24:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-25 17:24:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 188. [2022-11-25 17:24:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-11-25 17:24:25,452 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 123 [2022-11-25 17:24:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:25,452 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-11-25 17:24:25,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-11-25 17:24:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 17:24:25,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:25,453 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:25,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-11-25 17:24:25,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:25,653 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:24:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1176779391, now seen corresponding path program 52 times [2022-11-25 17:24:25,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:25,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421460290] [2022-11-25 17:24:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:25,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 731 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:28,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:28,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421460290] [2022-11-25 17:24:28,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421460290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:28,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271933686] [2022-11-25 17:24:28,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:24:28,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:28,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:28,148 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:28,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-25 17:24:28,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:24:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:28,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 17:24:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:32,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:35,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271933686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:35,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:24:35,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 149 [2022-11-25 17:24:35,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209529157] [2022-11-25 17:24:35,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:35,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-11-25 17:24:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-11-25 17:24:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4044, Invalid=18008, Unknown=0, NotChecked=0, Total=22052 [2022-11-25 17:24:35,877 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:40,656 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2022-11-25 17:24:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-25 17:24:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-25 17:24:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:40,657 INFO L225 Difference]: With dead ends: 255 [2022-11-25 17:24:40,657 INFO L226 Difference]: Without dead ends: 188 [2022-11-25 17:24:40,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 133 SyntacticMatches, 30 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17320 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=6503, Invalid=26077, Unknown=0, NotChecked=0, Total=32580 [2022-11-25 17:24:40,659 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:40,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 142 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:24:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-25 17:24:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-11-25 17:24:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-11-25 17:24:40,815 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 125 [2022-11-25 17:24:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:40,816 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-11-25 17:24:40,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0067114093959733) internal successors, (299), 149 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-11-25 17:24:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 17:24:40,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:40,816 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:40,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:41,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-11-25 17:24:41,017 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:24:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash -52958497, now seen corresponding path program 52 times [2022-11-25 17:24:41,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779810315] [2022-11-25 17:24:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:41,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 676 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:44,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779810315] [2022-11-25 17:24:44,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779810315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292792961] [2022-11-25 17:24:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:24:44,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:44,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:44,214 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:44,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-25 17:24:44,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:24:44,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:44,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 17:24:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:48,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:51,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292792961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:51,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:24:51,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 149 [2022-11-25 17:24:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308073519] [2022-11-25 17:24:51,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-11-25 17:24:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-11-25 17:24:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4071, Invalid=17981, Unknown=0, NotChecked=0, Total=22052 [2022-11-25 17:24:51,851 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:54,634 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2022-11-25 17:24:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 17:24:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-25 17:24:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:54,635 INFO L225 Difference]: With dead ends: 197 [2022-11-25 17:24:54,635 INFO L226 Difference]: Without dead ends: 191 [2022-11-25 17:24:54,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 133 SyntacticMatches, 30 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17181 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=8170, Invalid=24050, Unknown=0, NotChecked=0, Total=32220 [2022-11-25 17:24:54,638 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 648 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:54,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 45 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:24:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-25 17:24:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2022-11-25 17:24:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-11-25 17:24:54,797 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 125 [2022-11-25 17:24:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:54,797 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-11-25 17:24:54,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 149 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-11-25 17:24:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 17:24:54,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:54,798 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:54,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:55,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:55,002 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:24:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash 922396481, now seen corresponding path program 53 times [2022-11-25 17:24:55,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:55,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415550354] [2022-11-25 17:24:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:55,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 729 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:57,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:57,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415550354] [2022-11-25 17:24:57,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415550354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:57,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113638172] [2022-11-25 17:24:57,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:24:57,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:57,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:57,606 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:57,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-25 17:24:57,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-11-25 17:24:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:57,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-25 17:24:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:01,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:05,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113638172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:05,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:05,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 156 [2022-11-25 17:25:05,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52015899] [2022-11-25 17:25:05,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:05,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-11-25 17:25:05,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-11-25 17:25:05,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4301, Invalid=19879, Unknown=0, NotChecked=0, Total=24180 [2022-11-25 17:25:05,797 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:12,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:25:12,132 INFO L93 Difference]: Finished difference Result 333 states and 338 transitions. [2022-11-25 17:25:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-25 17:25:12,133 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 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 127 [2022-11-25 17:25:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:25:12,133 INFO L225 Difference]: With dead ends: 333 [2022-11-25 17:25:12,133 INFO L226 Difference]: Without dead ends: 264 [2022-11-25 17:25:12,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 131 SyntacticMatches, 31 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19068 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=7109, Invalid=29563, Unknown=0, NotChecked=0, Total=36672 [2022-11-25 17:25:12,136 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 195 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:25:12,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 145 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:25:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-25 17:25:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 192. [2022-11-25 17:25:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-11-25 17:25:12,298 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 127 [2022-11-25 17:25:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:25:12,299 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-11-25 17:25:12,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-11-25 17:25:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 17:25:12,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:25:12,299 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:12,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:12,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a417ddb1-2ebe-472a-b4c8-0b1f773cb303/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-11-25 17:25:12,500 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:25:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 188582013, now seen corresponding path program 53 times [2022-11-25 17:25:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903163055] [2022-11-25 17:25:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:12,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat