./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6ed30b303d6fb0e908856d82f87ad98b96903c62bb28b3526266b7f6b77369b0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:33:43,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:33:43,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:33:43,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:33:43,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:33:43,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:33:43,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:33:43,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:33:43,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:33:43,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:33:43,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:33:43,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:33:43,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:33:43,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:33:43,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:33:43,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:33:43,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:33:43,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:33:43,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:33:43,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:33:43,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:33:43,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:33:43,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:33:43,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:33:43,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:33:43,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:33:43,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:33:43,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:33:43,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:33:43,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:33:43,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:33:43,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:33:43,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:33:43,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:33:43,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:33:43,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:33:43,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:33:43,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:33:43,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:33:43,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:33:43,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:33:43,523 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:33:43,576 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:33:43,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:33:43,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:33:43,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:33:43,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:33:43,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:33:43,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:33:43,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:33:43,581 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:33:43,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:33:43,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:33:43,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:33:43,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:33:43,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:33:43,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:33:43,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:33:43,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:33:43,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:33:43,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:33:43,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:33:43,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:33:43,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:33:43,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:33:43,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:33:43,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:33:43,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:33:43,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:33:43,587 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:33:43,588 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:33:43,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:33:43,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ed30b303d6fb0e908856d82f87ad98b96903c62bb28b3526266b7f6b77369b0 [2022-11-18 20:33:44,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:33:44,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:33:44,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:33:44,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:33:44,068 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:33:44,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.2.prop1-back-serstep.c [2022-11-18 20:33:44,155 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/data/da6a369d9/9a6d31ead7604269bbf945d08f406a84/FLAG2440e4155 [2022-11-18 20:33:45,195 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:33:45,196 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.2.prop1-back-serstep.c [2022-11-18 20:33:45,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/data/da6a369d9/9a6d31ead7604269bbf945d08f406a84/FLAG2440e4155 [2022-11-18 20:33:45,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/data/da6a369d9/9a6d31ead7604269bbf945d08f406a84 [2022-11-18 20:33:45,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:33:45,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:33:45,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:33:45,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:33:45,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:33:45,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:33:45" (1/1) ... [2022-11-18 20:33:45,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6a1302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:45, skipping insertion in model container [2022-11-18 20:33:45,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:33:45" (1/1) ... [2022-11-18 20:33:45,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:33:45,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:33:46,257 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:33:47,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:33:47,198 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:33:47,211 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:33:47,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:33:47,586 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:33:47,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47 WrapperNode [2022-11-18 20:33:47,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:33:47,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:33:47,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:33:47,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:33:47,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:47,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,330 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 8479 [2022-11-18 20:33:48,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:33:48,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:33:48,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:33:48,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:33:48,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:33:48,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:33:48,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:33:48,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:33:48,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (1/1) ... [2022-11-18 20:33:48,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:33:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:48,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:33:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:33:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:33:49,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:33:50,090 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:33:50,093 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:34:07,572 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:34:07,606 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:34:07,606 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:34:07,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:07 BoogieIcfgContainer [2022-11-18 20:34:07,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:34:07,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:34:07,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:34:07,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:34:07,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:33:45" (1/3) ... [2022-11-18 20:34:07,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6732596a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:34:07, skipping insertion in model container [2022-11-18 20:34:07,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:33:47" (2/3) ... [2022-11-18 20:34:07,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6732596a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:34:07, skipping insertion in model container [2022-11-18 20:34:07,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:07" (3/3) ... [2022-11-18 20:34:07,627 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.telephony.2.prop1-back-serstep.c [2022-11-18 20:34:07,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:34:07,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:34:07,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:34:07,796 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;@6e504054, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:34:07,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:34:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 1451 states, 1449 states have (on average 1.6652864044168392) internal successors, (2413), 1450 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-11-18 20:34:07,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:07,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:07,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1983780285, now seen corresponding path program 1 times [2022-11-18 20:34:07,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:07,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042258686] [2022-11-18 20:34:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:07,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:10,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042258686] [2022-11-18 20:34:10,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042258686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:10,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:10,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:34:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744210008] [2022-11-18 20:34:10,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:10,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:34:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:34:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:34:10,239 INFO L87 Difference]: Start difference. First operand has 1451 states, 1449 states have (on average 1.6652864044168392) internal successors, (2413), 1450 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 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) [2022-11-18 20:34:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:11,105 INFO L93 Difference]: Finished difference Result 4783 states and 7967 transitions. [2022-11-18 20:34:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:34:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 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 301 [2022-11-18 20:34:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:11,148 INFO L225 Difference]: With dead ends: 4783 [2022-11-18 20:34:11,148 INFO L226 Difference]: Without dead ends: 3334 [2022-11-18 20:34:11,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:34:11,165 INFO L413 NwaCegarLoop]: 3145 mSDtfsCounter, 7197 mSDsluCounter, 3878 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7197 SdHoareTripleChecker+Valid, 7023 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:11,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7197 Valid, 7023 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:34:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2022-11-18 20:34:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 1449. [2022-11-18 20:34:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 1.6636740331491713) internal successors, (2409), 1448 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2409 transitions. [2022-11-18 20:34:11,331 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2409 transitions. Word has length 301 [2022-11-18 20:34:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:11,340 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 2409 transitions. [2022-11-18 20:34:11,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 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) [2022-11-18 20:34:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2409 transitions. [2022-11-18 20:34:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-18 20:34:11,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:11,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:34:11,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1369373415, now seen corresponding path program 1 times [2022-11-18 20:34:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:11,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005632810] [2022-11-18 20:34:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:13,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:13,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005632810] [2022-11-18 20:34:13,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005632810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:13,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:13,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:34:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418784025] [2022-11-18 20:34:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:13,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:34:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:34:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:34:13,073 INFO L87 Difference]: Start difference. First operand 1449 states and 2409 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:15,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:34:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:16,035 INFO L93 Difference]: Finished difference Result 5335 states and 8878 transitions. [2022-11-18 20:34:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:34:16,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 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 302 [2022-11-18 20:34:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:16,055 INFO L225 Difference]: With dead ends: 5335 [2022-11-18 20:34:16,056 INFO L226 Difference]: Without dead ends: 3888 [2022-11-18 20:34:16,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:34:16,065 INFO L413 NwaCegarLoop]: 2403 mSDtfsCounter, 5429 mSDsluCounter, 4802 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5429 SdHoareTripleChecker+Valid, 7205 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:16,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5429 Valid, 7205 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-18 20:34:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2022-11-18 20:34:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 1892. [2022-11-18 20:34:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 1.6636700158646218) internal successors, (3146), 1891 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 3146 transitions. [2022-11-18 20:34:16,156 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 3146 transitions. Word has length 302 [2022-11-18 20:34:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:16,158 INFO L495 AbstractCegarLoop]: Abstraction has 1892 states and 3146 transitions. [2022-11-18 20:34:16,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 3146 transitions. [2022-11-18 20:34:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1266 [2022-11-18 20:34:16,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:16,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:34:16,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:16,267 INFO L85 PathProgramCache]: Analyzing trace with hash -722226643, now seen corresponding path program 1 times [2022-11-18 20:34:16,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:16,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492144376] [2022-11-18 20:34:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:16,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:16,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50138523] [2022-11-18 20:34:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:16,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:16,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:16,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:16,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:34:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 10399 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 20:34:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:31,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-11-18 20:34:35,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:35,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492144376] [2022-11-18 20:34:35,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:35,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50138523] [2022-11-18 20:34:35,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50138523] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:35,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:35,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-18 20:34:35,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810475477] [2022-11-18 20:34:35,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:35,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:34:35,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:34:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:34:35,974 INFO L87 Difference]: Start difference. First operand 1892 states and 3146 transitions. Second operand has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:49,828 INFO L93 Difference]: Finished difference Result 6221 states and 10347 transitions. [2022-11-18 20:34:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:34:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 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 1265 [2022-11-18 20:34:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:49,857 INFO L225 Difference]: With dead ends: 6221 [2022-11-18 20:34:49,857 INFO L226 Difference]: Without dead ends: 6219 [2022-11-18 20:34:49,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2538 GetRequests, 2522 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:34:49,861 INFO L413 NwaCegarLoop]: 1591 mSDtfsCounter, 23967 mSDsluCounter, 2829 mSDsCounter, 0 mSdLazyCounter, 5755 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23967 SdHoareTripleChecker+Valid, 4420 SdHoareTripleChecker+Invalid, 5762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 5755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:49,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23967 Valid, 4420 Invalid, 5762 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 5755 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-18 20:34:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2022-11-18 20:34:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 1895. [2022-11-18 20:34:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 1.663674762407603) internal successors, (3151), 1894 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 3151 transitions. [2022-11-18 20:34:49,953 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 3151 transitions. Word has length 1265 [2022-11-18 20:34:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:49,961 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 3151 transitions. [2022-11-18 20:34:49,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 3151 transitions. [2022-11-18 20:34:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1266 [2022-11-18 20:34:50,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:50,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:50,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:34:50,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:50,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:50,264 INFO L85 PathProgramCache]: Analyzing trace with hash -722167061, now seen corresponding path program 1 times [2022-11-18 20:34:50,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:50,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816523846] [2022-11-18 20:34:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:50,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952156862] [2022-11-18 20:34:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:50,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:50,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:50,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:34:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 10399 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 20:34:56,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:59,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-11-18 20:35:02,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816523846] [2022-11-18 20:35:02,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952156862] [2022-11-18 20:35:02,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952156862] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:02,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:35:02,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-11-18 20:35:02,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126739686] [2022-11-18 20:35:02,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:02,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:35:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:02,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:35:02,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:35:02,399 INFO L87 Difference]: Start difference. First operand 1895 states and 3151 transitions. Second operand has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:03,747 INFO L93 Difference]: Finished difference Result 6224 states and 10355 transitions. [2022-11-18 20:35:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:35:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 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 1265 [2022-11-18 20:35:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:03,769 INFO L225 Difference]: With dead ends: 6224 [2022-11-18 20:35:03,769 INFO L226 Difference]: Without dead ends: 4774 [2022-11-18 20:35:03,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2530 GetRequests, 2523 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:35:03,774 INFO L413 NwaCegarLoop]: 3139 mSDtfsCounter, 7187 mSDsluCounter, 5529 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7187 SdHoareTripleChecker+Valid, 8668 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:03,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7187 Valid, 8668 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:35:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2022-11-18 20:35:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 1892. [2022-11-18 20:35:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 1.6636700158646218) internal successors, (3146), 1891 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 3146 transitions. [2022-11-18 20:35:03,842 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 3146 transitions. Word has length 1265 [2022-11-18 20:35:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:03,845 INFO L495 AbstractCegarLoop]: Abstraction has 1892 states and 3146 transitions. [2022-11-18 20:35:03,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 3146 transitions. [2022-11-18 20:35:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2022-11-18 20:35:03,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:03,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:03,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:04,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1124620143, now seen corresponding path program 1 times [2022-11-18 20:35:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070971754] [2022-11-18 20:35:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:04,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:04,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:35:04,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878419338] [2022-11-18 20:35:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:04,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:04,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:04,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:35:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 10402 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-18 20:35:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:17,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-11-18 20:35:21,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:21,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070971754] [2022-11-18 20:35:21,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878419338] [2022-11-18 20:35:21,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878419338] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:21,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:35:21,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-18 20:35:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190931950] [2022-11-18 20:35:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:21,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:35:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:35:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:35:21,454 INFO L87 Difference]: Start difference. First operand 1892 states and 3146 transitions. Second operand has 8 states, 8 states have (on average 121.875) internal successors, (975), 8 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:42,551 INFO L93 Difference]: Finished difference Result 7680 states and 12768 transitions. [2022-11-18 20:35:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:35:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 121.875) internal successors, (975), 8 states have internal predecessors, (975), 0 states have call successors, (0), 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 1266 [2022-11-18 20:35:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:42,607 INFO L225 Difference]: With dead ends: 7680 [2022-11-18 20:35:42,608 INFO L226 Difference]: Without dead ends: 7678 [2022-11-18 20:35:42,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2555 GetRequests, 2524 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:35:42,614 INFO L413 NwaCegarLoop]: 1581 mSDtfsCounter, 31172 mSDsluCounter, 6489 mSDsCounter, 0 mSdLazyCounter, 11532 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31172 SdHoareTripleChecker+Valid, 8070 SdHoareTripleChecker+Invalid, 11540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 11532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:42,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31172 Valid, 8070 Invalid, 11540 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [8 Valid, 11532 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-11-18 20:35:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2022-11-18 20:35:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 1898. [2022-11-18 20:35:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 1.6636794939377966) internal successors, (3156), 1897 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 3156 transitions. [2022-11-18 20:35:42,704 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 3156 transitions. Word has length 1266 [2022-11-18 20:35:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:42,706 INFO L495 AbstractCegarLoop]: Abstraction has 1898 states and 3156 transitions. [2022-11-18 20:35:42,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.875) internal successors, (975), 8 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 3156 transitions. [2022-11-18 20:35:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2022-11-18 20:35:42,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:42,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:42,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:42,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:42,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1124560561, now seen corresponding path program 1 times [2022-11-18 20:35:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:42,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131990293] [2022-11-18 20:35:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:42,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:43,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:35:43,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641916699] [2022-11-18 20:35:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:43,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:43,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:43,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:43,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:35:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 10402 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-18 20:35:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:56,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-11-18 20:36:00,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:00,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131990293] [2022-11-18 20:36:00,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641916699] [2022-11-18 20:36:00,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641916699] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:00,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:36:00,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-18 20:36:00,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594932105] [2022-11-18 20:36:00,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:36:00,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:36:00,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:36:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:36:00,189 INFO L87 Difference]: Start difference. First operand 1898 states and 3156 transitions. Second operand has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:01,199 INFO L93 Difference]: Finished difference Result 6241 states and 10380 transitions. [2022-11-18 20:36:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:36:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 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 1266 [2022-11-18 20:36:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:01,214 INFO L225 Difference]: With dead ends: 6241 [2022-11-18 20:36:01,215 INFO L226 Difference]: Without dead ends: 4786 [2022-11-18 20:36:01,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2537 GetRequests, 2521 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:36:01,219 INFO L413 NwaCegarLoop]: 3137 mSDtfsCounter, 9590 mSDsluCounter, 8665 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9590 SdHoareTripleChecker+Valid, 11802 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:01,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9590 Valid, 11802 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:36:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2022-11-18 20:36:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 1892. [2022-11-18 20:36:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 1.6636700158646218) internal successors, (3146), 1891 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 3146 transitions. [2022-11-18 20:36:01,285 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 3146 transitions. Word has length 1266 [2022-11-18 20:36:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:01,287 INFO L495 AbstractCegarLoop]: Abstraction has 1892 states and 3146 transitions. [2022-11-18 20:36:01,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 3146 transitions. [2022-11-18 20:36:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2022-11-18 20:36:01,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:01,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:01,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:36:01,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:01,511 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash 703395473, now seen corresponding path program 1 times [2022-11-18 20:36:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308217765] [2022-11-18 20:36:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:01,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:01,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101356962] [2022-11-18 20:36:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:01,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:01,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:01,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:01,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:36:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:06,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 10405 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 20:36:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:13,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-18 20:36:17,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308217765] [2022-11-18 20:36:17,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101356962] [2022-11-18 20:36:17,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101356962] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:17,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:36:17,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-11-18 20:36:17,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150256825] [2022-11-18 20:36:17,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:36:17,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:36:17,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:17,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:36:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:36:17,330 INFO L87 Difference]: Start difference. First operand 1892 states and 3146 transitions. Second operand has 9 states, 9 states have (on average 108.66666666666667) internal successors, (978), 9 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:39,036 INFO L93 Difference]: Finished difference Result 7719 states and 12827 transitions. [2022-11-18 20:36:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:36:39,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 108.66666666666667) internal successors, (978), 9 states have internal predecessors, (978), 0 states have call successors, (0), 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 1267 [2022-11-18 20:36:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:39,056 INFO L225 Difference]: With dead ends: 7719 [2022-11-18 20:36:39,056 INFO L226 Difference]: Without dead ends: 7717 [2022-11-18 20:36:39,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2569 GetRequests, 2530 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:36:39,061 INFO L413 NwaCegarLoop]: 1575 mSDtfsCounter, 48025 mSDsluCounter, 5743 mSDsCounter, 0 mSdLazyCounter, 11545 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48025 SdHoareTripleChecker+Valid, 7318 SdHoareTripleChecker+Invalid, 11556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 11545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:39,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48025 Valid, 7318 Invalid, 11556 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [11 Valid, 11545 Invalid, 0 Unknown, 0 Unchecked, 20.3s Time] [2022-11-18 20:36:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7717 states. [2022-11-18 20:36:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7717 to 1901. [2022-11-18 20:36:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 1.6636842105263159) internal successors, (3161), 1900 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 3161 transitions. [2022-11-18 20:36:39,142 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 3161 transitions. Word has length 1267 [2022-11-18 20:36:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:39,144 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 3161 transitions. [2022-11-18 20:36:39,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 108.66666666666667) internal successors, (978), 9 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 3161 transitions. [2022-11-18 20:36:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2022-11-18 20:36:39,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:39,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:39,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 20:36:39,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:39,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash 703455055, now seen corresponding path program 1 times [2022-11-18 20:36:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:39,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268091702] [2022-11-18 20:36:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:39,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:39,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:39,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155520853] [2022-11-18 20:36:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:39,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:39,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:39,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:39,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:36:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 10405 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-18 20:36:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:54,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-18 20:36:56,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268091702] [2022-11-18 20:36:56,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155520853] [2022-11-18 20:36:56,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155520853] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:56,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:36:56,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-11-18 20:36:56,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681373784] [2022-11-18 20:36:56,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:36:56,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:36:56,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:36:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:36:56,853 INFO L87 Difference]: Start difference. First operand 1901 states and 3161 transitions. Second operand has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:16,325 INFO L93 Difference]: Finished difference Result 9170 states and 15250 transitions. [2022-11-18 20:37:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:37:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 0 states have call successors, (0), 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 1267 [2022-11-18 20:37:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:16,342 INFO L225 Difference]: With dead ends: 9170 [2022-11-18 20:37:16,343 INFO L226 Difference]: Without dead ends: 7709 [2022-11-18 20:37:16,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2554 GetRequests, 2527 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:37:16,348 INFO L413 NwaCegarLoop]: 2432 mSDtfsCounter, 16821 mSDsluCounter, 9001 mSDsCounter, 0 mSdLazyCounter, 15541 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16821 SdHoareTripleChecker+Valid, 11433 SdHoareTripleChecker+Invalid, 15547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:16,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16821 Valid, 11433 Invalid, 15547 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [6 Valid, 15541 Invalid, 0 Unknown, 0 Unchecked, 18.7s Time] [2022-11-18 20:37:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7709 states. [2022-11-18 20:37:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7709 to 1901. [2022-11-18 20:37:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 1.6631578947368422) internal successors, (3160), 1900 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 3160 transitions. [2022-11-18 20:37:16,425 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 3160 transitions. Word has length 1267 [2022-11-18 20:37:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:16,427 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 3160 transitions. [2022-11-18 20:37:16,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 3160 transitions. [2022-11-18 20:37:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1269 [2022-11-18 20:37:16,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:16,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:16,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:37:16,654 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash 748143529, now seen corresponding path program 1 times [2022-11-18 20:37:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:16,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60191160] [2022-11-18 20:37:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:16,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:17,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:37:17,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603684964] [2022-11-18 20:37:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:17,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:17,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:17,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:17,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:37:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 10408 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 20:37:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:30,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-18 20:37:33,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:33,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60191160] [2022-11-18 20:37:33,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:37:33,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603684964] [2022-11-18 20:37:33,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603684964] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:33,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:37:33,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2022-11-18 20:37:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045362065] [2022-11-18 20:37:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:37:33,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:37:33,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:37:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:37:33,715 INFO L87 Difference]: Start difference. First operand 1901 states and 3160 transitions. Second operand has 10 states, 10 states have (on average 98.1) internal successors, (981), 10 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:59,799 INFO L93 Difference]: Finished difference Result 7785 states and 12931 transitions. [2022-11-18 20:37:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:37:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 98.1) internal successors, (981), 10 states have internal predecessors, (981), 0 states have call successors, (0), 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 1268 [2022-11-18 20:37:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:59,817 INFO L225 Difference]: With dead ends: 7785 [2022-11-18 20:37:59,817 INFO L226 Difference]: Without dead ends: 7783 [2022-11-18 20:37:59,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2591 GetRequests, 2540 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:37:59,823 INFO L413 NwaCegarLoop]: 1569 mSDtfsCounter, 50441 mSDsluCounter, 8342 mSDsCounter, 0 mSdLazyCounter, 15247 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50441 SdHoareTripleChecker+Valid, 9911 SdHoareTripleChecker+Invalid, 15258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:59,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50441 Valid, 9911 Invalid, 15258 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [11 Valid, 15247 Invalid, 0 Unknown, 0 Unchecked, 24.0s Time] [2022-11-18 20:37:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7783 states. [2022-11-18 20:37:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7783 to 1913. [2022-11-18 20:37:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.6631799163179917) internal successors, (3180), 1912 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3180 transitions. [2022-11-18 20:37:59,898 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3180 transitions. Word has length 1268 [2022-11-18 20:37:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:59,899 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3180 transitions. [2022-11-18 20:37:59,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.1) internal successors, (981), 10 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3180 transitions. [2022-11-18 20:37:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1269 [2022-11-18 20:37:59,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:59,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:59,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:00,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:00,147 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 748203111, now seen corresponding path program 1 times [2022-11-18 20:38:00,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:00,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638443147] [2022-11-18 20:38:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:00,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:00,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:38:00,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070223488] [2022-11-18 20:38:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:00,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:00,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:00,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:00,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:38:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 10408 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-18 20:38:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:13,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-18 20:38:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:14,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638443147] [2022-11-18 20:38:14,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:38:14,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070223488] [2022-11-18 20:38:14,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070223488] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:14,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:38:14,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 18 [2022-11-18 20:38:14,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957265125] [2022-11-18 20:38:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:38:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:14,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:38:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:38:14,947 INFO L87 Difference]: Start difference. First operand 1913 states and 3180 transitions. Second operand has 7 states, 7 states have (on average 140.14285714285714) internal successors, (981), 7 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:16,373 INFO L93 Difference]: Finished difference Result 6332 states and 10524 transitions. [2022-11-18 20:38:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:38:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 140.14285714285714) internal successors, (981), 7 states have internal predecessors, (981), 0 states have call successors, (0), 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 1268 [2022-11-18 20:38:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:16,388 INFO L225 Difference]: With dead ends: 6332 [2022-11-18 20:38:16,389 INFO L226 Difference]: Without dead ends: 4859 [2022-11-18 20:38:16,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2553 GetRequests, 2527 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:38:16,392 INFO L413 NwaCegarLoop]: 3133 mSDtfsCounter, 14419 mSDsluCounter, 14931 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14419 SdHoareTripleChecker+Valid, 18064 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:16,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14419 Valid, 18064 Invalid, 58 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:38:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2022-11-18 20:38:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 1901. [2022-11-18 20:38:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 1.6631578947368422) internal successors, (3160), 1900 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 3160 transitions. [2022-11-18 20:38:16,449 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 3160 transitions. Word has length 1268 [2022-11-18 20:38:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:16,450 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 3160 transitions. [2022-11-18 20:38:16,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 140.14285714285714) internal successors, (981), 7 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 3160 transitions. [2022-11-18 20:38:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1270 [2022-11-18 20:38:16,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:16,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:16,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:16,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:38:16,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1874123447, now seen corresponding path program 1 times [2022-11-18 20:38:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:16,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257104039] [2022-11-18 20:38:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:16,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:17,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:38:17,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257715096] [2022-11-18 20:38:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:17,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:17,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:17,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:38:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:22,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 10411 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-18 20:38:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:30,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-11-18 20:38:33,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257104039] [2022-11-18 20:38:33,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:38:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257715096] [2022-11-18 20:38:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257715096] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:38:33,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2022-11-18 20:38:33,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793042372] [2022-11-18 20:38:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:33,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:38:33,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:38:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:38:33,679 INFO L87 Difference]: Start difference. First operand 1901 states and 3160 transitions. Second operand has 11 states, 11 states have (on average 89.45454545454545) internal successors, (984), 11 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:03,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:03,757 INFO L93 Difference]: Finished difference Result 7850 states and 13038 transitions. [2022-11-18 20:39:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 20:39:03,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 89.45454545454545) internal successors, (984), 11 states have internal predecessors, (984), 0 states have call successors, (0), 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 1269 [2022-11-18 20:39:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:03,768 INFO L225 Difference]: With dead ends: 7850 [2022-11-18 20:39:03,768 INFO L226 Difference]: Without dead ends: 7848 [2022-11-18 20:39:03,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2608 GetRequests, 2547 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=672, Invalid=3234, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 20:39:03,774 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 60141 mSDsluCounter, 7995 mSDsCounter, 0 mSdLazyCounter, 16340 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60141 SdHoareTripleChecker+Valid, 9558 SdHoareTripleChecker+Invalid, 16351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:03,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60141 Valid, 9558 Invalid, 16351 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [11 Valid, 16340 Invalid, 0 Unknown, 0 Unchecked, 27.3s Time] [2022-11-18 20:39:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2022-11-18 20:39:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 1916. [2022-11-18 20:39:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 1.6631853785900783) internal successors, (3185), 1915 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 3185 transitions. [2022-11-18 20:39:03,844 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 3185 transitions. Word has length 1269 [2022-11-18 20:39:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:03,846 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 3185 transitions. [2022-11-18 20:39:03,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 89.45454545454545) internal successors, (984), 11 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 3185 transitions. [2022-11-18 20:39:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1270 [2022-11-18 20:39:03,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:03,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:03,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:39:04,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1874183029, now seen corresponding path program 1 times [2022-11-18 20:39:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47148169] [2022-11-18 20:39:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:04,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:04,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:39:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493340708] [2022-11-18 20:39:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:04,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:04,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:04,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:39:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:10,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 10411 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 20:39:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:24,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-11-18 20:39:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47148169] [2022-11-18 20:39:26,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:39:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493340708] [2022-11-18 20:39:26,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493340708] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:26,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:39:26,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2022-11-18 20:39:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655846910] [2022-11-18 20:39:26,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:39:26,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:39:26,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:26,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:39:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:39:26,849 INFO L87 Difference]: Start difference. First operand 1916 states and 3185 transitions. Second operand has 9 states, 9 states have (on average 109.33333333333333) internal successors, (984), 9 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:51,377 INFO L93 Difference]: Finished difference Result 9339 states and 15522 transitions. [2022-11-18 20:39:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:39:51,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 109.33333333333333) internal successors, (984), 9 states have internal predecessors, (984), 0 states have call successors, (0), 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 1269 [2022-11-18 20:39:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:51,384 INFO L225 Difference]: With dead ends: 9339 [2022-11-18 20:39:51,384 INFO L226 Difference]: Without dead ends: 7857 [2022-11-18 20:39:51,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2578 GetRequests, 2535 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:39:51,388 INFO L413 NwaCegarLoop]: 2426 mSDtfsCounter, 21682 mSDsluCounter, 14050 mSDsCounter, 0 mSdLazyCounter, 22323 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21682 SdHoareTripleChecker+Valid, 16476 SdHoareTripleChecker+Invalid, 22327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:51,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21682 Valid, 16476 Invalid, 22327 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4 Valid, 22323 Invalid, 0 Unknown, 0 Unchecked, 23.2s Time] [2022-11-18 20:39:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2022-11-18 20:39:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 1907. [2022-11-18 20:39:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 1.6631689401888772) internal successors, (3170), 1906 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3170 transitions. [2022-11-18 20:39:51,454 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3170 transitions. Word has length 1269 [2022-11-18 20:39:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:51,455 INFO L495 AbstractCegarLoop]: Abstraction has 1907 states and 3170 transitions. [2022-11-18 20:39:51,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 109.33333333333333) internal successors, (984), 9 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3170 transitions. [2022-11-18 20:39:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1271 [2022-11-18 20:39:51,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:51,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:51,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:51,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:51,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1096152445, now seen corresponding path program 1 times [2022-11-18 20:39:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:51,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059870439] [2022-11-18 20:39:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:51,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:52,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:39:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123064612] [2022-11-18 20:39:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:52,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:52,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:52,062 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:52,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:39:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:57,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 10414 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-18 20:39:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:03,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-18 20:40:06,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059870439] [2022-11-18 20:40:06,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:40:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123064612] [2022-11-18 20:40:06,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123064612] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:06,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:40:06,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2022-11-18 20:40:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108961602] [2022-11-18 20:40:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:06,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:40:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:40:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:40:06,107 INFO L87 Difference]: Start difference. First operand 1907 states and 3170 transitions. Second operand has 12 states, 12 states have (on average 82.25) internal successors, (987), 12 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:35,597 INFO L93 Difference]: Finished difference Result 7961 states and 13220 transitions. [2022-11-18 20:40:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:40:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 82.25) internal successors, (987), 12 states have internal predecessors, (987), 0 states have call successors, (0), 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 1270 [2022-11-18 20:40:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:35,603 INFO L225 Difference]: With dead ends: 7961 [2022-11-18 20:40:35,604 INFO L226 Difference]: Without dead ends: 7959 [2022-11-18 20:40:35,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2627 GetRequests, 2556 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=886, Invalid=4370, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 20:40:35,606 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 67436 mSDsluCounter, 9020 mSDsCounter, 0 mSdLazyCounter, 18466 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67436 SdHoareTripleChecker+Valid, 10577 SdHoareTripleChecker+Invalid, 18480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 18466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:35,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67436 Valid, 10577 Invalid, 18480 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [14 Valid, 18466 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2022-11-18 20:40:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7959 states. [2022-11-18 20:40:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7959 to 1925. [2022-11-18 20:40:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 1.6632016632016633) internal successors, (3200), 1924 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 3200 transitions. [2022-11-18 20:40:35,671 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 3200 transitions. Word has length 1270 [2022-11-18 20:40:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:35,672 INFO L495 AbstractCegarLoop]: Abstraction has 1925 states and 3200 transitions. [2022-11-18 20:40:35,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.25) internal successors, (987), 12 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 3200 transitions. [2022-11-18 20:40:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1271 [2022-11-18 20:40:35,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:35,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:35,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:40:35,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:35,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:40:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1096092863, now seen corresponding path program 1 times [2022-11-18 20:40:35,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:35,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687723169] [2022-11-18 20:40:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:35,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:36,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:40:36,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168303821] [2022-11-18 20:40:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:36,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:36,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:36,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:40:36,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:40:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:41,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 10414 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 20:40:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:44,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-18 20:40:48,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:48,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687723169] [2022-11-18 20:40:48,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:40:48,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168303821] [2022-11-18 20:40:48,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168303821] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:48,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:40:48,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-18 20:40:48,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014294605] [2022-11-18 20:40:48,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:48,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:40:48,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:48,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:40:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:40:48,704 INFO L87 Difference]: Start difference. First operand 1925 states and 3200 transitions. Second operand has 9 states, 9 states have (on average 109.66666666666667) internal successors, (987), 9 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:50,215 INFO L93 Difference]: Finished difference Result 6434 states and 10694 transitions. [2022-11-18 20:40:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:40:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 109.66666666666667) internal successors, (987), 9 states have internal predecessors, (987), 0 states have call successors, (0), 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 1270 [2022-11-18 20:40:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:50,224 INFO L225 Difference]: With dead ends: 6434 [2022-11-18 20:40:50,224 INFO L226 Difference]: Without dead ends: 4943 [2022-11-18 20:40:50,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2569 GetRequests, 2537 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:40:50,228 INFO L413 NwaCegarLoop]: 3129 mSDtfsCounter, 19268 mSDsluCounter, 21189 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19268 SdHoareTripleChecker+Valid, 24318 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:50,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19268 Valid, 24318 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:40:50,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-11-18 20:40:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 1907. [2022-11-18 20:40:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 1.6631689401888772) internal successors, (3170), 1906 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3170 transitions. [2022-11-18 20:40:50,287 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3170 transitions. Word has length 1270 [2022-11-18 20:40:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:50,289 INFO L495 AbstractCegarLoop]: Abstraction has 1907 states and 3170 transitions. [2022-11-18 20:40:50,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 109.66666666666667) internal successors, (987), 9 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3170 transitions. [2022-11-18 20:40:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1272 [2022-11-18 20:40:50,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:50,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:50,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:40:50,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:50,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:40:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 277648923, now seen corresponding path program 1 times [2022-11-18 20:40:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755730366] [2022-11-18 20:40:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:50,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:40:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127148375] [2022-11-18 20:40:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:50,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:50,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:50,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:40:50,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:40:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:57,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 10417 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 20:40:57,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:05,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-18 20:41:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755730366] [2022-11-18 20:41:08,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:41:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127148375] [2022-11-18 20:41:08,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127148375] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:08,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:41:08,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 26 [2022-11-18 20:41:08,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102888055] [2022-11-18 20:41:08,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:08,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:41:08,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:41:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:41:08,419 INFO L87 Difference]: Start difference. First operand 1907 states and 3170 transitions. Second operand has 13 states, 13 states have (on average 76.15384615384616) internal successors, (990), 13 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:47,118 INFO L93 Difference]: Finished difference Result 8041 states and 13352 transitions. [2022-11-18 20:41:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 20:41:47,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 76.15384615384616) internal successors, (990), 13 states have internal predecessors, (990), 0 states have call successors, (0), 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 1271 [2022-11-18 20:41:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:47,132 INFO L225 Difference]: With dead ends: 8041 [2022-11-18 20:41:47,132 INFO L226 Difference]: Without dead ends: 8039 [2022-11-18 20:41:47,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2641 GetRequests, 2562 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1081, Invalid=5399, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:41:47,141 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 65067 mSDsluCounter, 11586 mSDsCounter, 0 mSdLazyCounter, 22190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65067 SdHoareTripleChecker+Valid, 13137 SdHoareTripleChecker+Invalid, 22202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:47,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65067 Valid, 13137 Invalid, 22202 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [12 Valid, 22190 Invalid, 0 Unknown, 0 Unchecked, 34.3s Time] [2022-11-18 20:41:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8039 states. [2022-11-18 20:41:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8039 to 1928. [2022-11-18 20:41:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 1.6632070576024909) internal successors, (3205), 1927 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 3205 transitions. [2022-11-18 20:41:47,213 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 3205 transitions. Word has length 1271 [2022-11-18 20:41:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:47,215 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 3205 transitions. [2022-11-18 20:41:47,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.15384615384616) internal successors, (990), 13 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 3205 transitions. [2022-11-18 20:41:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1272 [2022-11-18 20:41:47,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:47,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:47,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-18 20:41:47,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:41:47,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash 277708505, now seen corresponding path program 1 times [2022-11-18 20:41:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878584527] [2022-11-18 20:41:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:47,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:41:47,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948903112] [2022-11-18 20:41:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:47,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:47,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:47,856 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:47,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:41:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 10417 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-18 20:41:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:06,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-18 20:42:09,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:09,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878584527] [2022-11-18 20:42:09,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:42:09,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948903112] [2022-11-18 20:42:09,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948903112] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:09,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:42:09,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 25 [2022-11-18 20:42:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123617816] [2022-11-18 20:42:09,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:42:09,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:42:09,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:09,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:42:09,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:42:09,321 INFO L87 Difference]: Start difference. First operand 1928 states and 3205 transitions. Second operand has 11 states, 11 states have (on average 90.0) internal successors, (990), 11 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:41,895 INFO L93 Difference]: Finished difference Result 9501 states and 15792 transitions. [2022-11-18 20:42:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:42:41,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 90.0) internal successors, (990), 11 states have internal predecessors, (990), 0 states have call successors, (0), 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 1271 [2022-11-18 20:42:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:41,902 INFO L225 Difference]: With dead ends: 9501 [2022-11-18 20:42:41,902 INFO L226 Difference]: Without dead ends: 8001 [2022-11-18 20:42:41,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2602 GetRequests, 2547 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=498, Invalid=2694, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:42:41,906 INFO L413 NwaCegarLoop]: 2420 mSDtfsCounter, 26567 mSDsluCounter, 18699 mSDsCounter, 0 mSdLazyCounter, 28023 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26567 SdHoareTripleChecker+Valid, 21119 SdHoareTripleChecker+Invalid, 28029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:41,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26567 Valid, 21119 Invalid, 28029 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [6 Valid, 28023 Invalid, 0 Unknown, 0 Unchecked, 30.5s Time] [2022-11-18 20:42:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2022-11-18 20:42:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 1913. [2022-11-18 20:42:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.6631799163179917) internal successors, (3180), 1912 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3180 transitions. [2022-11-18 20:42:41,976 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3180 transitions. Word has length 1271 [2022-11-18 20:42:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:41,978 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3180 transitions. [2022-11-18 20:42:41,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 90.0) internal successors, (990), 11 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3180 transitions. [2022-11-18 20:42:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1273 [2022-11-18 20:42:41,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:41,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:42,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:42,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:42:42,211 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:42:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash -91622245, now seen corresponding path program 1 times [2022-11-18 20:42:42,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:42,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496562848] [2022-11-18 20:42:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:42,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:42,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:42:42,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099016427] [2022-11-18 20:42:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:42,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:42,661 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:42,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:42:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 10420 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-18 20:42:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:56,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-18 20:42:59,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:59,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496562848] [2022-11-18 20:42:59,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:42:59,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099016427] [2022-11-18 20:42:59,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099016427] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:59,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:42:59,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 28 [2022-11-18 20:42:59,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568576368] [2022-11-18 20:42:59,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:42:59,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:42:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:42:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:42:59,373 INFO L87 Difference]: Start difference. First operand 1913 states and 3180 transitions. Second operand has 14 states, 14 states have (on average 70.92857142857143) internal successors, (993), 14 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:41,844 INFO L93 Difference]: Finished difference Result 8135 states and 13510 transitions. [2022-11-18 20:43:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:43:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 70.92857142857143) internal successors, (993), 14 states have internal predecessors, (993), 0 states have call successors, (0), 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 1272 [2022-11-18 20:43:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:41,851 INFO L225 Difference]: With dead ends: 8135 [2022-11-18 20:43:41,852 INFO L226 Difference]: Without dead ends: 8133 [2022-11-18 20:43:41,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2663 GetRequests, 2572 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1401, Invalid=7155, Unknown=0, NotChecked=0, Total=8556 [2022-11-18 20:43:41,856 INFO L413 NwaCegarLoop]: 1545 mSDtfsCounter, 79589 mSDsluCounter, 11906 mSDsCounter, 0 mSdLazyCounter, 24277 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79589 SdHoareTripleChecker+Valid, 13451 SdHoareTripleChecker+Invalid, 24290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:41,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79589 Valid, 13451 Invalid, 24290 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [13 Valid, 24277 Invalid, 0 Unknown, 0 Unchecked, 36.9s Time] [2022-11-18 20:43:41,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8133 states. [2022-11-18 20:43:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8133 to 1937. [2022-11-18 20:43:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 1.6632231404958677) internal successors, (3220), 1936 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3220 transitions. [2022-11-18 20:43:41,923 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3220 transitions. Word has length 1272 [2022-11-18 20:43:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:41,925 INFO L495 AbstractCegarLoop]: Abstraction has 1937 states and 3220 transitions. [2022-11-18 20:43:41,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.92857142857143) internal successors, (993), 14 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3220 transitions. [2022-11-18 20:43:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1273 [2022-11-18 20:43:41,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:41,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:42,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:42,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:43:42,159 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -91562663, now seen corresponding path program 1 times [2022-11-18 20:43:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109656364] [2022-11-18 20:43:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:42,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:42,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429453332] [2022-11-18 20:43:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:42,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:42,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:42,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:42,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:43:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 10420 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-18 20:43:49,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:59,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-18 20:44:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109656364] [2022-11-18 20:44:02,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:44:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429453332] [2022-11-18 20:44:02,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429453332] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:02,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:44:02,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18] total 26 [2022-11-18 20:44:02,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535901763] [2022-11-18 20:44:02,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:02,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:44:02,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:02,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:44:02,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:44:02,210 INFO L87 Difference]: Start difference. First operand 1937 states and 3220 transitions. Second operand has 11 states, 11 states have (on average 90.27272727272727) internal successors, (993), 11 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:05,045 INFO L93 Difference]: Finished difference Result 6536 states and 10864 transitions. [2022-11-18 20:44:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:44:05,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 90.27272727272727) internal successors, (993), 11 states have internal predecessors, (993), 0 states have call successors, (0), 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 1272 [2022-11-18 20:44:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:05,052 INFO L225 Difference]: With dead ends: 6536 [2022-11-18 20:44:05,052 INFO L226 Difference]: Without dead ends: 5027 [2022-11-18 20:44:05,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2585 GetRequests, 2539 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:44:05,055 INFO L413 NwaCegarLoop]: 3125 mSDtfsCounter, 24137 mSDsluCounter, 27439 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24137 SdHoareTripleChecker+Valid, 30564 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:05,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24137 Valid, 30564 Invalid, 130 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 20:44:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-11-18 20:44:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 1913. [2022-11-18 20:44:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.6631799163179917) internal successors, (3180), 1912 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3180 transitions. [2022-11-18 20:44:05,095 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3180 transitions. Word has length 1272 [2022-11-18 20:44:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:05,096 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3180 transitions. [2022-11-18 20:44:05,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 90.27272727272727) internal successors, (993), 11 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3180 transitions. [2022-11-18 20:44:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1274 [2022-11-18 20:44:05,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:05,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:05,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:05,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:44:05,331 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1212146111, now seen corresponding path program 1 times [2022-11-18 20:44:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895843069] [2022-11-18 20:44:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:05,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:05,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:44:05,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224506787] [2022-11-18 20:44:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:05,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:05,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:05,735 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:05,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:44:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:12,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 10423 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-18 20:44:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:20,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-11-18 20:44:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895843069] [2022-11-18 20:44:23,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:44:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224506787] [2022-11-18 20:44:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224506787] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:23,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:44:23,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [17] total 30 [2022-11-18 20:44:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179437813] [2022-11-18 20:44:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:23,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:44:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:44:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:44:23,601 INFO L87 Difference]: Start difference. First operand 1913 states and 3180 transitions. Second operand has 15 states, 15 states have (on average 66.4) internal successors, (996), 15 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:01,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:11,142 INFO L93 Difference]: Finished difference Result 8150 states and 13538 transitions. [2022-11-18 20:45:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-18 20:45:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 66.4) internal successors, (996), 15 states have internal predecessors, (996), 0 states have call successors, (0), 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 1273 [2022-11-18 20:45:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:11,151 INFO L225 Difference]: With dead ends: 8150 [2022-11-18 20:45:11,151 INFO L226 Difference]: Without dead ends: 8148 [2022-11-18 20:45:11,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2680 GetRequests, 2579 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1702, Invalid=8804, Unknown=0, NotChecked=0, Total=10506 [2022-11-18 20:45:11,156 INFO L413 NwaCegarLoop]: 1539 mSDtfsCounter, 86878 mSDsluCounter, 12924 mSDsCounter, 0 mSdLazyCounter, 26410 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86878 SdHoareTripleChecker+Valid, 14463 SdHoareTripleChecker+Invalid, 26420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:11,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86878 Valid, 14463 Invalid, 26420 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [10 Valid, 26410 Invalid, 0 Unknown, 0 Unchecked, 40.9s Time] [2022-11-18 20:45:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8148 states. [2022-11-18 20:45:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8148 to 1940. [2022-11-18 20:45:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 1.66322846828262) internal successors, (3225), 1939 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 3225 transitions. [2022-11-18 20:45:11,208 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 3225 transitions. Word has length 1273 [2022-11-18 20:45:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:11,210 INFO L495 AbstractCegarLoop]: Abstraction has 1940 states and 3225 transitions. [2022-11-18 20:45:11,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.4) internal successors, (996), 15 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 3225 transitions. [2022-11-18 20:45:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1274 [2022-11-18 20:45:11,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:11,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:11,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:11,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:11,447 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1212086529, now seen corresponding path program 1 times [2022-11-18 20:45:11,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:11,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376727501] [2022-11-18 20:45:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:11,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:11,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99402103] [2022-11-18 20:45:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:11,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:11,927 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:11,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:45:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 10423 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-18 20:45:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:22,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-11-18 20:45:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:24,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376727501] [2022-11-18 20:45:24,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:24,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99402103] [2022-11-18 20:45:24,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99402103] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:24,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:45:24,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 24 [2022-11-18 20:45:24,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976025985] [2022-11-18 20:45:24,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:24,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:45:24,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:45:24,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:45:24,392 INFO L87 Difference]: Start difference. First operand 1940 states and 3225 transitions. Second operand has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:26,759 INFO L93 Difference]: Finished difference Result 6581 states and 10939 transitions. [2022-11-18 20:45:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:45:26,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 0 states have call successors, (0), 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 1273 [2022-11-18 20:45:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:26,765 INFO L225 Difference]: With dead ends: 6581 [2022-11-18 20:45:26,765 INFO L226 Difference]: Without dead ends: 5063 [2022-11-18 20:45:26,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2593 GetRequests, 2546 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:45:26,769 INFO L413 NwaCegarLoop]: 3123 mSDtfsCounter, 26579 mSDsluCounter, 30561 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26579 SdHoareTripleChecker+Valid, 33684 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:26,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26579 Valid, 33684 Invalid, 153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:45:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2022-11-18 20:45:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 1913. [2022-11-18 20:45:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.6631799163179917) internal successors, (3180), 1912 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3180 transitions. [2022-11-18 20:45:26,811 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3180 transitions. Word has length 1273 [2022-11-18 20:45:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:26,812 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3180 transitions. [2022-11-18 20:45:26,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3180 transitions. [2022-11-18 20:45:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2022-11-18 20:45:26,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:26,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:26,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:27,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:27,047 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:27,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1944209547, now seen corresponding path program 1 times [2022-11-18 20:45:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850308201] [2022-11-18 20:45:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:27,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:27,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928006275] [2022-11-18 20:45:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:27,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:27,483 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:27,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:45:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 10426 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-18 20:45:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:41,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-18 20:45:45,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:45,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850308201] [2022-11-18 20:45:45,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:45,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928006275] [2022-11-18 20:45:45,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928006275] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:45,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:45:45,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [18] total 32 [2022-11-18 20:45:45,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630704075] [2022-11-18 20:45:45,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:45,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:45:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:45:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:45:45,734 INFO L87 Difference]: Start difference. First operand 1913 states and 3180 transitions. Second operand has 16 states, 16 states have (on average 62.4375) internal successors, (999), 16 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:34,330 INFO L93 Difference]: Finished difference Result 8213 states and 13643 transitions. [2022-11-18 20:46:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-18 20:46:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 62.4375) internal successors, (999), 16 states have internal predecessors, (999), 0 states have call successors, (0), 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 1274 [2022-11-18 20:46:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:34,338 INFO L225 Difference]: With dead ends: 8213 [2022-11-18 20:46:34,338 INFO L226 Difference]: Without dead ends: 8211 [2022-11-18 20:46:34,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2698 GetRequests, 2587 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2032, Invalid=10624, Unknown=0, NotChecked=0, Total=12656 [2022-11-18 20:46:34,342 INFO L413 NwaCegarLoop]: 1533 mSDtfsCounter, 98947 mSDsluCounter, 13751 mSDsCounter, 0 mSdLazyCounter, 28029 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98947 SdHoareTripleChecker+Valid, 15284 SdHoareTripleChecker+Invalid, 28039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:34,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98947 Valid, 15284 Invalid, 28039 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [10 Valid, 28029 Invalid, 0 Unknown, 0 Unchecked, 40.8s Time] [2022-11-18 20:46:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-11-18 20:46:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 1943. [2022-11-18 20:46:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 1.663233779608651) internal successors, (3230), 1942 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3230 transitions. [2022-11-18 20:46:34,388 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3230 transitions. Word has length 1274 [2022-11-18 20:46:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:34,390 INFO L495 AbstractCegarLoop]: Abstraction has 1943 states and 3230 transitions. [2022-11-18 20:46:34,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.4375) internal successors, (999), 16 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3230 transitions. [2022-11-18 20:46:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2022-11-18 20:46:34,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:34,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:34,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:34,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:34,683 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1944149965, now seen corresponding path program 1 times [2022-11-18 20:46:34,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:34,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300205125] [2022-11-18 20:46:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:35,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:46:35,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830250649] [2022-11-18 20:46:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:35,072 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:35,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:46:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 10426 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-18 20:46:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 2 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:45,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-18 20:46:49,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300205125] [2022-11-18 20:46:49,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:49,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830250649] [2022-11-18 20:46:49,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830250649] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:49,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:46:49,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2022-11-18 20:46:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899152820] [2022-11-18 20:46:49,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:46:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:46:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:46:49,770 INFO L87 Difference]: Start difference. First operand 1943 states and 3230 transitions. Second operand has 13 states, 13 states have (on average 76.84615384615384) internal successors, (999), 13 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:52,770 INFO L93 Difference]: Finished difference Result 6611 states and 10989 transitions. [2022-11-18 20:46:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:46:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 76.84615384615384) internal successors, (999), 13 states have internal predecessors, (999), 0 states have call successors, (0), 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 1274 [2022-11-18 20:46:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:52,779 INFO L225 Difference]: With dead ends: 6611 [2022-11-18 20:46:52,779 INFO L226 Difference]: Without dead ends: 5087 [2022-11-18 20:46:52,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2601 GetRequests, 2549 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 20:46:52,783 INFO L413 NwaCegarLoop]: 3121 mSDtfsCounter, 29026 mSDsluCounter, 33681 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29026 SdHoareTripleChecker+Valid, 36802 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:52,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29026 Valid, 36802 Invalid, 178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 20:46:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5087 states. [2022-11-18 20:46:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5087 to 1913. [2022-11-18 20:46:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.6631799163179917) internal successors, (3180), 1912 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3180 transitions. [2022-11-18 20:46:52,825 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3180 transitions. Word has length 1274 [2022-11-18 20:46:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:52,827 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3180 transitions. [2022-11-18 20:46:52,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.84615384615384) internal successors, (999), 13 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3180 transitions. [2022-11-18 20:46:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2022-11-18 20:46:52,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:52,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:52,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-18 20:46:53,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:53,059 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2025672869, now seen corresponding path program 1 times [2022-11-18 20:46:53,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:53,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285397316] [2022-11-18 20:46:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:53,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:53,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:46:53,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791889983] [2022-11-18 20:46:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:53,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:53,483 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:53,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa23e630-c6f9-4f29-9fef-7fdff9606961/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:47:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 10429 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-18 20:47:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates...