./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0eda672a1401330c428e19b34263886ea0c057fa2f6ccf2bc341fc3e3b3427c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:26:39,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:26:39,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:26:39,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:26:39,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:26:39,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:26:39,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:26:39,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:26:39,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:26:39,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:26:39,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:26:39,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:26:39,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:26:39,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:26:39,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:26:39,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:26:39,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:26:39,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:26:39,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:26:39,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:26:39,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:26:39,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:26:39,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:26:39,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:26:39,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:26:39,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:26:39,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:26:39,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:26:39,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:26:39,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:26:39,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:26:39,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:26:39,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:26:39,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:26:39,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:26:39,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:26:39,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:26:39,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:26:39,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:26:39,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:26:39,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:26:39,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:26:39,525 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:26:39,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:26:39,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:26:39,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:26:39,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:26:39,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:26:39,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:26:39,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:26:39,528 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:26:39,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:26:39,530 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:26:39,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:26:39,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:26:39,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:26:39,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:26:39,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:26:39,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:26:39,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:26:39,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:26:39,532 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:26:39,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:26:39,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:26:39,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:26:39,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:26:39,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:26:39,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:26:39,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:26:39,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:26:39,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:26:39,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:26:39,535 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:26:39,535 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:26:39,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:26:39,536 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_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0eda672a1401330c428e19b34263886ea0c057fa2f6ccf2bc341fc3e3b3427c [2022-10-17 10:26:39,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:26:39,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:26:39,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:26:39,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:26:39,864 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:26:39,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-10-17 10:26:39,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/data/1aa0f3627/1fe9932edfab4cb7a23acd9e400dc94a/FLAGd8c8d5236 [2022-10-17 10:26:40,377 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:26:40,383 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-10-17 10:26:40,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/data/1aa0f3627/1fe9932edfab4cb7a23acd9e400dc94a/FLAGd8c8d5236 [2022-10-17 10:26:40,763 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/data/1aa0f3627/1fe9932edfab4cb7a23acd9e400dc94a [2022-10-17 10:26:40,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:26:40,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:26:40,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:26:40,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:26:40,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:26:40,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:26:40" (1/1) ... [2022-10-17 10:26:40,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38491a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:40, skipping insertion in model container [2022-10-17 10:26:40,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:26:40" (1/1) ... [2022-10-17 10:26:40,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:26:40,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:26:40,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[537,550] [2022-10-17 10:26:41,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:26:41,016 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:26:41,032 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[537,550] [2022-10-17 10:26:41,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:26:41,065 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:26:41,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41 WrapperNode [2022-10-17 10:26:41,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:26:41,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:26:41,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:26:41,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:26:41,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,098 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-10-17 10:26:41,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:26:41,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:26:41,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:26:41,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:26:41,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:26:41,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:26:41,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:26:41,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:26:41,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (1/1) ... [2022-10-17 10:26:41,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:26:41,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:41,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:26:41,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:26:41,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:26:41,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:26:41,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:26:41,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:26:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:26:41,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:26:41,270 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:26:41,272 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:26:41,394 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:26:41,401 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:26:41,401 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:26:41,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:26:41 BoogieIcfgContainer [2022-10-17 10:26:41,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:26:41,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:26:41,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:26:41,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:26:41,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:26:40" (1/3) ... [2022-10-17 10:26:41,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fd1963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:26:41, skipping insertion in model container [2022-10-17 10:26:41,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:41" (2/3) ... [2022-10-17 10:26:41,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fd1963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:26:41, skipping insertion in model container [2022-10-17 10:26:41,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:26:41" (3/3) ... [2022-10-17 10:26:41,418 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.c [2022-10-17 10:26:41,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:26:41,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:26:41,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:26:41,500 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;@3f3bce74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:26:41,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:26:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:26:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:26:41,513 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:41,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:41,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2022-10-17 10:26:41,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:41,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062276902] [2022-10-17 10:26:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:41,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:41,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:41,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062276902] [2022-10-17 10:26:41,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:26:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440627614] [2022-10-17 10:26:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:41,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:41,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:41,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:41,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:26:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:26:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:41,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:26:41,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440627614] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:41,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:41,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:26:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403191483] [2022-10-17 10:26:41,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:41,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:26:41,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:26:41,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:26:41,888 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:41,907 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-10-17 10:26:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:26:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 10:26:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:41,917 INFO L225 Difference]: With dead ends: 39 [2022-10-17 10:26:41,917 INFO L226 Difference]: Without dead ends: 17 [2022-10-17 10:26:41,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:26:41,924 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:41,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-10-17 10:26:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-10-17 10:26:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:26:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-10-17 10:26:41,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-10-17 10:26:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:41,962 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-10-17 10:26:41,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-10-17 10:26:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:26:41,963 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:41,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:41,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 10:26:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 10:26:42,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2022-10-17 10:26:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:42,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806262451] [2022-10-17 10:26:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:42,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:42,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806262451] [2022-10-17 10:26:42,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:26:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48507056] [2022-10-17 10:26:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:42,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:42,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:42,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:26:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:26:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:42,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:26:42,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48507056] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:42,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:42,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:26:42,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283602568] [2022-10-17 10:26:42,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:42,401 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:42,417 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-10-17 10:26:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:26:42,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:26:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:42,418 INFO L225 Difference]: With dead ends: 26 [2022-10-17 10:26:42,418 INFO L226 Difference]: Without dead ends: 19 [2022-10-17 10:26:42,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:42,421 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:42,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-10-17 10:26:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-10-17 10:26:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:26:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-10-17 10:26:42,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2022-10-17 10:26:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:42,428 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-10-17 10:26:42,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-10-17 10:26:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:26:42,429 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:42,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:42,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:26:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:42,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:42,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2022-10-17 10:26:42,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:42,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182203249] [2022-10-17 10:26:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:42,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:42,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:26:42,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105667495] [2022-10-17 10:26:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:42,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:42,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:42,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:42,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:26:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:42,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:26:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:42,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:26:42,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:42,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182203249] [2022-10-17 10:26:42,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:26:42,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105667495] [2022-10-17 10:26:42,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105667495] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:42,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:42,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:26:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830628954] [2022-10-17 10:26:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:26:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:26:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:42,814 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:42,898 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-10-17 10:26:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:26:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:42,902 INFO L225 Difference]: With dead ends: 30 [2022-10-17 10:26:42,902 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 10:26:42,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:26:42,904 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:42,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 10:26:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-10-17 10:26:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:26:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-10-17 10:26:42,922 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-10-17 10:26:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:42,922 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-10-17 10:26:42,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-10-17 10:26:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:26:42,923 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:42,923 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:42,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:26:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:43,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash 845350648, now seen corresponding path program 1 times [2022-10-17 10:26:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603006998] [2022-10-17 10:26:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:43,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:43,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:26:43,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922795189] [2022-10-17 10:26:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:43,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:43,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:43,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:26:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:43,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:26:43,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:43,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:26:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603006998] [2022-10-17 10:26:43,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:26:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922795189] [2022-10-17 10:26:43,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922795189] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:43,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:43,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:26:43,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157013031] [2022-10-17 10:26:43,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:43,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:26:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:43,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:26:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:43,277 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:26:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:43,346 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-10-17 10:26:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-10-17 10:26:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:43,353 INFO L225 Difference]: With dead ends: 34 [2022-10-17 10:26:43,353 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 10:26:43,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:26:43,355 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:43,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 10:26:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-10-17 10:26:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:26:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-10-17 10:26:43,362 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-10-17 10:26:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:43,363 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-10-17 10:26:43,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:26:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-10-17 10:26:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:26:43,364 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:43,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:43,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:26:43,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:43,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2022-10-17 10:26:43,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:43,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956706870] [2022-10-17 10:26:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:43,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:43,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:26:43,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224191764] [2022-10-17 10:26:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:43,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:43,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:43,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:26:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:43,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:26:43,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:43,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:26:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:43,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956706870] [2022-10-17 10:26:43,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:26:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224191764] [2022-10-17 10:26:43,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224191764] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:26:43,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:26:43,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-10-17 10:26:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739428974] [2022-10-17 10:26:43,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:26:43,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:26:43,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:26:43,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:26:43,790 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:26:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:43,881 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-10-17 10:26:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:26:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-10-17 10:26:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:43,884 INFO L225 Difference]: With dead ends: 62 [2022-10-17 10:26:43,885 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 10:26:43,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:26:43,892 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:43,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 104 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 10:26:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-10-17 10:26:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:26:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-10-17 10:26:43,913 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2022-10-17 10:26:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:43,913 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-10-17 10:26:43,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:26:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-10-17 10:26:43,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:26:43,915 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:43,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:43,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:26:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:44,133 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2022-10-17 10:26:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:44,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946669733] [2022-10-17 10:26:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:44,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:26:44,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078560308] [2022-10-17 10:26:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:44,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:44,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:44,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:44,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:26:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-17 10:26:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:46,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:26:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:52,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:52,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946669733] [2022-10-17 10:26:52,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:26:52,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078560308] [2022-10-17 10:26:52,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078560308] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:26:52,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:26:52,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-10-17 10:26:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9899018] [2022-10-17 10:26:52,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:26:52,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:26:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:26:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=142, Unknown=2, NotChecked=0, Total=182 [2022-10-17 10:26:52,014 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:26:55,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:26:57,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:27:00,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:27:02,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:02,868 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-10-17 10:27:02,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:27:02,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-10-17 10:27:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:02,871 INFO L225 Difference]: With dead ends: 86 [2022-10-17 10:27:02,872 INFO L226 Difference]: Without dead ends: 84 [2022-10-17 10:27:02,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=77, Invalid=301, Unknown=2, NotChecked=0, Total=380 [2022-10-17 10:27:02,873 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:02,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 67 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 124 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2022-10-17 10:27:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-17 10:27:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-10-17 10:27:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:27:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-10-17 10:27:02,892 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 20 [2022-10-17 10:27:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:02,892 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-10-17 10:27:02,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-10-17 10:27:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:27:02,893 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:02,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:02,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:03,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:03,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:03,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:03,110 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2022-10-17 10:27:03,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:03,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945676067] [2022-10-17 10:27:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:03,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:27:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003273307] [2022-10-17 10:27:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:03,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:03,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:03,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:03,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:27:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-17 10:27:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:27:04,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:27:05,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945676067] [2022-10-17 10:27:05,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:27:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003273307] [2022-10-17 10:27:05,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003273307] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:05,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:27:05,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-10-17 10:27:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96475680] [2022-10-17 10:27:05,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:05,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:27:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:27:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:27:05,750 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:07,317 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2022-10-17 10:27:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:27:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-10-17 10:27:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:07,319 INFO L225 Difference]: With dead ends: 115 [2022-10-17 10:27:07,319 INFO L226 Difference]: Without dead ends: 104 [2022-10-17 10:27:07,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:27:07,320 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:07,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 77 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:27:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-10-17 10:27:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-10-17 10:27:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:27:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-10-17 10:27:07,338 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 20 [2022-10-17 10:27:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:07,338 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-10-17 10:27:07,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:27:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-10-17 10:27:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:27:07,339 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:07,340 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:07,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:07,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:27:07,543 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2022-10-17 10:27:07,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:07,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856429330] [2022-10-17 10:27:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:07,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:07,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:27:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256415637] [2022-10-17 10:27:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:07,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:07,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:07,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:07,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:27:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:27:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:27:07,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:27:07,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:07,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856429330] [2022-10-17 10:27:07,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:27:07,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256415637] [2022-10-17 10:27:07,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256415637] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:07,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:27:07,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-10-17 10:27:07,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547287988] [2022-10-17 10:27:07,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:07,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:27:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:27:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:27:07,815 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:09,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:27:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:27:10,034 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2022-10-17 10:27:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-10-17 10:27:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:27:10,036 INFO L225 Difference]: With dead ends: 92 [2022-10-17 10:27:10,036 INFO L226 Difference]: Without dead ends: 82 [2022-10-17 10:27:10,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:27:10,037 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:27:10,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 71 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-10-17 10:27:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-17 10:27:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-10-17 10:27:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:27:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-10-17 10:27:10,051 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 26 [2022-10-17 10:27:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:27:10,052 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-10-17 10:27:10,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:27:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-10-17 10:27:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 10:27:10,054 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:27:10,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:10,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-17 10:27:10,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:27:10,279 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:27:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash -158147061, now seen corresponding path program 1 times [2022-10-17 10:27:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500885103] [2022-10-17 10:27:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:10,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:27:10,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135373586] [2022-10-17 10:27:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:10,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:10,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:10,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768c9c-2496-49b2-92d2-5d6a92948cba/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:27:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:10,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 39 conjunts are in the unsatisfiable core [2022-10-17 10:27:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates...