./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:57:33,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:57:34,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:57:34,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:57:34,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:57:34,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:57:34,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:57:34,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:57:34,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:57:34,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:57:34,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:57:34,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:57:34,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:57:34,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:57:34,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:57:34,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:57:34,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:57:34,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:57:34,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:57:34,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:57:34,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:57:34,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:57:34,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:57:34,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:57:34,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:57:34,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:57:34,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:57:34,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:57:34,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:57:34,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:57:34,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:57:34,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:57:34,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:57:34,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:57:34,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:57:34,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:57:34,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:57:34,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:57:34,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:57:34,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:57:34,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:57:34,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:57:34,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:57:34,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:57:34,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:57:34,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:57:34,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:57:34,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:57:34,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:57:34,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:57:34,177 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:57:34,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:57:34,179 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:57:34,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:57:34,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:57:34,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:57:34,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:57:34,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:57:34,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:57:34,181 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:57:34,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:57:34,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:57:34,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:57:34,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:57:34,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:57:34,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:57:34,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:57:34,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:57:34,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:57:34,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:57:34,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:57:34,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:57:34,187 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:57:34,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:57:34,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:57:34,188 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_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 [2022-11-18 20:57:34,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:57:34,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:57:34,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:57:34,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:57:34,593 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:57:34,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2022-11-18 20:57:34,677 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/data/9632ea092/829d94b286d84b93bdaf6dfad992a7e8/FLAGdc4777388 [2022-11-18 20:57:35,319 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:57:35,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2022-11-18 20:57:35,329 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/data/9632ea092/829d94b286d84b93bdaf6dfad992a7e8/FLAGdc4777388 [2022-11-18 20:57:35,349 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/data/9632ea092/829d94b286d84b93bdaf6dfad992a7e8 [2022-11-18 20:57:35,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:57:35,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:57:35,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:57:35,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:57:35,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:57:35,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4d9ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35, skipping insertion in model container [2022-11-18 20:57:35,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:57:35,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:57:35,587 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2022-11-18 20:57:35,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:57:35,629 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:57:35,660 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2022-11-18 20:57:35,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:57:35,689 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:57:35,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35 WrapperNode [2022-11-18 20:57:35,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:57:35,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:57:35,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:57:35,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:57:35,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,740 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-11-18 20:57:35,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:57:35,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:57:35,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:57:35,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:57:35,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,783 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:57:35,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:57:35,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:57:35,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:57:35,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (1/1) ... [2022-11-18 20:57:35,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:57:35,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:35,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:57:35,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:57:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:57:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:57:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:57:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:57:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:57:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:57:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:57:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:57:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:57:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:57:35,971 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:57:35,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:57:36,220 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:57:36,228 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:57:36,228 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:57:36,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:57:36 BoogieIcfgContainer [2022-11-18 20:57:36,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:57:36,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:57:36,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:57:36,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:57:36,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:57:35" (1/3) ... [2022-11-18 20:57:36,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d18d72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:57:36, skipping insertion in model container [2022-11-18 20:57:36,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:35" (2/3) ... [2022-11-18 20:57:36,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d18d72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:57:36, skipping insertion in model container [2022-11-18 20:57:36,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:57:36" (3/3) ... [2022-11-18 20:57:36,243 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2022-11-18 20:57:36,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:57:36,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:57:36,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:57:36,391 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;@7ff6bdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:57:36,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:57:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) [2022-11-18 20:57:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:57:36,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:36,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:36,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash -709303782, now seen corresponding path program 1 times [2022-11-18 20:57:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614755244] [2022-11-18 20:57:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:36,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:36,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614755244] [2022-11-18 20:57:36,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614755244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:36,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:36,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:57:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921415892] [2022-11-18 20:57:36,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:36,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:36,923 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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 3 states, 3 states have (on average 3.0) 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) [2022-11-18 20:57:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:36,968 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-11-18 20:57:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) 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 [2022-11-18 20:57:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:36,983 INFO L225 Difference]: With dead ends: 52 [2022-11-18 20:57:36,983 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 20:57:36,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:36,991 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:36,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:57:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 20:57:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-18 20:57:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-11-18 20:57:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-18 20:57:37,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2022-11-18 20:57:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:37,046 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-18 20:57:37,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) 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) [2022-11-18 20:57:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-18 20:57:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:57:37,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:37,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:37,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:57:37,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1757860049, now seen corresponding path program 1 times [2022-11-18 20:57:37,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:37,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33120832] [2022-11-18 20:57:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:37,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:57:37,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33120832] [2022-11-18 20:57:37,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33120832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:37,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:37,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:57:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105304093] [2022-11-18 20:57:37,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:37,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:37,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:37,237 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-18 20:57:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:37,266 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-11-18 20:57:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2022-11-18 20:57:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:37,268 INFO L225 Difference]: With dead ends: 43 [2022-11-18 20:57:37,268 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 20:57:37,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:37,270 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:37,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:57:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 20:57:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-11-18 20:57:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-11-18 20:57:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-18 20:57:37,280 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2022-11-18 20:57:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:37,280 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-18 20:57:37,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-18 20:57:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-18 20:57:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:57:37,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:37,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:37,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:57:37,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1154344644, now seen corresponding path program 1 times [2022-11-18 20:57:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:37,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263522345] [2022-11-18 20:57:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:37,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:57:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263522345] [2022-11-18 20:57:37,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263522345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:37,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053697894] [2022-11-18 20:57:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:37,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:37,472 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:37,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:57:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:57:37,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:57:37,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:57:37,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053697894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:37,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:37,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-18 20:57:37,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293073709] [2022-11-18 20:57:37,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:37,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:57:37,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:57:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:57:37,712 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-11-18 20:57:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:37,772 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-11-18 20:57:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:57:37,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 15 [2022-11-18 20:57:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:37,774 INFO L225 Difference]: With dead ends: 51 [2022-11-18 20:57:37,774 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 20:57:37,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:57:37,777 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:37,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 122 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:57:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 20:57:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-18 20:57:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2022-11-18 20:57:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-18 20:57:37,823 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2022-11-18 20:57:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:37,824 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-18 20:57:37,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-11-18 20:57:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-18 20:57:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:57:37,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:37,828 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:37,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:38,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:38,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2107451126, now seen corresponding path program 2 times [2022-11-18 20:57:38,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:38,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141649173] [2022-11-18 20:57:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:38,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:57:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141649173] [2022-11-18 20:57:38,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141649173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:38,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039436761] [2022-11-18 20:57:38,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:57:38,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:38,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:38,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:38,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:57:38,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:57:38,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:57:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:57:38,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:57:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039436761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:38,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:38,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-18 20:57:38,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131588709] [2022-11-18 20:57:38,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:38,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:57:38,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:57:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:57:38,613 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-11-18 20:57:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:38,890 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-11-18 20:57:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:57:38,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 21 [2022-11-18 20:57:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:38,897 INFO L225 Difference]: With dead ends: 68 [2022-11-18 20:57:38,897 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 20:57:38,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:57:38,900 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:38,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 120 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 20:57:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-18 20:57:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2022-11-18 20:57:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-11-18 20:57:38,921 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2022-11-18 20:57:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:38,921 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-11-18 20:57:38,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-11-18 20:57:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-11-18 20:57:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 20:57:38,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:38,925 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:38,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:39,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:39,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1706483837, now seen corresponding path program 3 times [2022-11-18 20:57:39,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:39,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179000847] [2022-11-18 20:57:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:39,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:57:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:39,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179000847] [2022-11-18 20:57:39,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179000847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:39,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830215603] [2022-11-18 20:57:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:57:39,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:39,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:39,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:39,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:57:39,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:57:39,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:39,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:57:39,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:57:39,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:57:40,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830215603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:40,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:40,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-18 20:57:40,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483076017] [2022-11-18 20:57:40,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:40,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:57:40,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:40,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:57:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:57:40,030 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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) [2022-11-18 20:57:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:40,370 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2022-11-18 20:57:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:57:40,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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 36 [2022-11-18 20:57:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:40,372 INFO L225 Difference]: With dead ends: 84 [2022-11-18 20:57:40,372 INFO L226 Difference]: Without dead ends: 61 [2022-11-18 20:57:40,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:57:40,374 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:40,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 138 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-18 20:57:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-11-18 20:57:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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) [2022-11-18 20:57:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-18 20:57:40,386 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 36 [2022-11-18 20:57:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:40,390 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-18 20:57:40,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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) [2022-11-18 20:57:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-18 20:57:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:57:40,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:40,396 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:40,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:40,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:40,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash 917953989, now seen corresponding path program 4 times [2022-11-18 20:57:40,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:40,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774007452] [2022-11-18 20:57:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:57:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:41,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774007452] [2022-11-18 20:57:41,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774007452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571334639] [2022-11-18 20:57:41,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:57:41,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:41,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:41,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:41,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:57:41,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:57:41,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:57:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:57:41,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:57:41,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571334639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:41,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:41,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-18 20:57:41,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061651223] [2022-11-18 20:57:41,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:41,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:57:41,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:57:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:57:41,668 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-11-18 20:57:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:41,813 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2022-11-18 20:57:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:57:41,814 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 50 [2022-11-18 20:57:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:41,815 INFO L225 Difference]: With dead ends: 121 [2022-11-18 20:57:41,816 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:57:41,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:57:41,817 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:41,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 170 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:57:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-18 20:57:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 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) [2022-11-18 20:57:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-11-18 20:57:41,831 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 50 [2022-11-18 20:57:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:41,831 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-11-18 20:57:41,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-11-18 20:57:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-11-18 20:57:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-18 20:57:41,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:41,833 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:41,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:57:42,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:42,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1581858143, now seen corresponding path program 5 times [2022-11-18 20:57:42,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:42,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456213085] [2022-11-18 20:57:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:42,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:57:43,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456213085] [2022-11-18 20:57:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456213085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279314353] [2022-11-18 20:57:43,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:57:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:43,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:43,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:43,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:57:50,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-18 20:57:50,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:57:50,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:57:50,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:57:51,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279314353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:51,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:51,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-18 20:57:51,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905587285] [2022-11-18 20:57:51,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:51,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 20:57:51,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 20:57:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:57:51,511 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-11-18 20:57:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:51,818 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2022-11-18 20:57:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 20:57:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 76 [2022-11-18 20:57:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:51,821 INFO L225 Difference]: With dead ends: 173 [2022-11-18 20:57:51,821 INFO L226 Difference]: Without dead ends: 138 [2022-11-18 20:57:51,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:57:51,824 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:51,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 122 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:57:51,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-18 20:57:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-11-18 20:57:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0746268656716418) internal successors, (144), 134 states have internal predecessors, (144), 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) [2022-11-18 20:57:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-11-18 20:57:51,843 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 76 [2022-11-18 20:57:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:51,844 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-11-18 20:57:51,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-11-18 20:57:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-11-18 20:57:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-18 20:57:51,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:51,847 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:51,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:52,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:52,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2095671533, now seen corresponding path program 6 times [2022-11-18 20:57:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353873316] [2022-11-18 20:57:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:57:55,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:55,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353873316] [2022-11-18 20:57:55,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353873316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735137690] [2022-11-18 20:57:55,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:57:55,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:55,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:55,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:57:56,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-18 20:57:56,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:56,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:57:56,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-11-18 20:57:57,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-11-18 20:57:57,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735137690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:57,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:57,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2022-11-18 20:57:57,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477912194] [2022-11-18 20:57:57,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:57,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-18 20:57:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-18 20:57:57,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2022-11-18 20:57:57,670 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 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) [2022-11-18 20:57:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:59,732 INFO L93 Difference]: Finished difference Result 200 states and 236 transitions. [2022-11-18 20:57:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-18 20:57:59,733 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 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 128 [2022-11-18 20:57:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:59,735 INFO L225 Difference]: With dead ends: 200 [2022-11-18 20:57:59,735 INFO L226 Difference]: Without dead ends: 165 [2022-11-18 20:57:59,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4914, Invalid=8892, Unknown=0, NotChecked=0, Total=13806 [2022-11-18 20:57:59,742 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 423 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:59,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 238 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:57:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-18 20:57:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-11-18 20:57:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.1125) internal successors, (178), 160 states have internal predecessors, (178), 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) [2022-11-18 20:57:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2022-11-18 20:57:59,758 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 128 [2022-11-18 20:57:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:59,758 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2022-11-18 20:57:59,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 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) [2022-11-18 20:57:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2022-11-18 20:57:59,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-18 20:57:59,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:59,760 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:59,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:59,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:59,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1928839019, now seen corresponding path program 7 times [2022-11-18 20:57:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:59,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823244305] [2022-11-18 20:57:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-18 20:58:03,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:03,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823244305] [2022-11-18 20:58:03,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823244305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:03,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274143658] [2022-11-18 20:58:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:58:03,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:03,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:03,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:03,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:58:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:58:03,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-18 20:58:03,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-18 20:58:08,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274143658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:08,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:08,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-11-18 20:58:08,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884498494] [2022-11-18 20:58:08,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:08,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-18 20:58:08,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-18 20:58:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-11-18 20:58:08,067 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-11-18 20:58:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:08,697 INFO L93 Difference]: Finished difference Result 329 states and 417 transitions. [2022-11-18 20:58:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-18 20:58:08,698 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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 154 [2022-11-18 20:58:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:08,700 INFO L225 Difference]: With dead ends: 329 [2022-11-18 20:58:08,700 INFO L226 Difference]: Without dead ends: 270 [2022-11-18 20:58:08,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-11-18 20:58:08,704 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:08,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 170 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:58:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-18 20:58:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-11-18 20:58:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 266 states have (on average 1.0676691729323309) internal successors, (284), 266 states have internal predecessors, (284), 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) [2022-11-18 20:58:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 288 transitions. [2022-11-18 20:58:08,734 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 288 transitions. Word has length 154 [2022-11-18 20:58:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:08,735 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 288 transitions. [2022-11-18 20:58:08,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-11-18 20:58:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 288 transitions. [2022-11-18 20:58:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-18 20:58:08,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:08,740 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:08,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:58:08,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash -464172929, now seen corresponding path program 8 times [2022-11-18 20:58:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:08,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400832708] [2022-11-18 20:58:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-18 20:58:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400832708] [2022-11-18 20:58:19,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400832708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389960973] [2022-11-18 20:58:19,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:19,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:19,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:19,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:19,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:58:20,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:58:20,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-18 20:58:20,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-18 20:58:20,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-18 20:58:36,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389960973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:36,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:36,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-11-18 20:58:36,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643731817] [2022-11-18 20:58:36,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-11-18 20:58:36,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-11-18 20:58:36,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-11-18 20:58:36,585 INFO L87 Difference]: Start difference. First operand 270 states and 288 transitions. Second operand has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-11-18 20:58:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:38,102 INFO L93 Difference]: Finished difference Result 541 states and 682 transitions. [2022-11-18 20:58:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-11-18 20:58:38,103 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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 260 [2022-11-18 20:58:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:38,107 INFO L225 Difference]: With dead ends: 541 [2022-11-18 20:58:38,107 INFO L226 Difference]: Without dead ends: 482 [2022-11-18 20:58:38,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-11-18 20:58:38,114 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 315 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:38,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 146 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:58:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-11-18 20:58:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2022-11-18 20:58:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 478 states have (on average 1.0376569037656904) internal successors, (496), 478 states have internal predecessors, (496), 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) [2022-11-18 20:58:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 500 transitions. [2022-11-18 20:58:38,151 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 500 transitions. Word has length 260 [2022-11-18 20:58:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:38,152 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 500 transitions. [2022-11-18 20:58:38,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-11-18 20:58:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 500 transitions. [2022-11-18 20:58:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-11-18 20:58:38,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:38,166 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:38,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 20:58:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:58:38,385 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1485341997, now seen corresponding path program 9 times [2022-11-18 20:58:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:38,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553613876] [2022-11-18 20:58:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-18 20:59:13,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553613876] [2022-11-18 20:59:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553613876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617304059] [2022-11-18 20:59:13,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:59:13,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:13,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:13,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:13,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:59:17,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-18 20:59:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:59:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-11-18 20:59:19,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-11-18 20:59:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617304059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:22,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:22,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2022-11-18 20:59:22,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309450436] [2022-11-18 20:59:22,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:22,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2022-11-18 20:59:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2022-11-18 20:59:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2022-11-18 20:59:22,641 INFO L87 Difference]: Start difference. First operand 482 states and 500 transitions. Second operand has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 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) [2022-11-18 20:59:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:49,389 INFO L93 Difference]: Finished difference Result 592 states and 660 transitions. [2022-11-18 20:59:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-11-18 20:59:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 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 472 [2022-11-18 20:59:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:49,394 INFO L225 Difference]: With dead ends: 592 [2022-11-18 20:59:49,394 INFO L226 Difference]: Without dead ends: 533 [2022-11-18 20:59:49,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28455 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=74346, Invalid=131316, Unknown=0, NotChecked=0, Total=205662 [2022-11-18 20:59:49,406 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1660 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:49,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 237 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:59:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-18 20:59:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 532. [2022-11-18 20:59:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 528 states have (on average 1.0643939393939394) internal successors, (562), 528 states have internal predecessors, (562), 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) [2022-11-18 20:59:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 566 transitions. [2022-11-18 20:59:49,435 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 566 transitions. Word has length 472 [2022-11-18 20:59:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:49,437 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 566 transitions. [2022-11-18 20:59:49,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 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) [2022-11-18 20:59:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 566 transitions. [2022-11-18 20:59:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-11-18 20:59:49,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:49,451 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:49,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 20:59:49,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:59:49,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1444814123, now seen corresponding path program 10 times [2022-11-18 20:59:49,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:49,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357853179] [2022-11-18 20:59:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:49,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-11-18 21:00:27,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:27,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357853179] [2022-11-18 21:00:27,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357853179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888602744] [2022-11-18 21:00:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:00:27,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:27,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:27,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:00:36,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:00:36,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:36,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 213 conjunts are in the unsatisfiable core [2022-11-18 21:00:36,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-11-18 21:00:37,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-11-18 21:01:40,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888602744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:40,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:01:40,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2022-11-18 21:01:40,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533618717] [2022-11-18 21:01:40,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2022-11-18 21:01:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2022-11-18 21:01:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-11-18 21:01:40,329 INFO L87 Difference]: Start difference. First operand 532 states and 566 transitions. Second operand has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 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) [2022-11-18 21:01:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:47,909 INFO L93 Difference]: Finished difference Result 1065 states and 1345 transitions. [2022-11-18 21:01:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2022-11-18 21:01:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 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 522 [2022-11-18 21:01:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:47,919 INFO L225 Difference]: With dead ends: 1065 [2022-11-18 21:01:47,919 INFO L226 Difference]: Without dead ends: 958 [2022-11-18 21:01:47,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1256 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 83.4s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-11-18 21:01:47,934 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 424 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:47,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 242 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 21:01:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-18 21:01:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2022-11-18 21:01:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 954 states have (on average 1.0356394129979036) internal successors, (988), 954 states have internal predecessors, (988), 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) [2022-11-18 21:01:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 992 transitions. [2022-11-18 21:01:47,996 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 992 transitions. Word has length 522 [2022-11-18 21:01:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:47,998 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 992 transitions. [2022-11-18 21:01:47,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 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) [2022-11-18 21:01:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 992 transitions. [2022-11-18 21:01:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2022-11-18 21:01:48,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:48,012 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:48,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:48,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 21:01:48,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash 18860031, now seen corresponding path program 11 times [2022-11-18 21:01:48,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:48,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853810288] [2022-11-18 21:01:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 181111 backedges. 0 proven. 179776 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-11-18 21:04:36,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853810288] [2022-11-18 21:04:36,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853810288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251383978] [2022-11-18 21:04:36,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:04:36,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:36,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:36,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:36,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e636982e-9cd8-4e77-8398-456db0203ebe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process