./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum40-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/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_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum40-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/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_fe10f1a6-7390-45b1-95b5-9cfc6c268825/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 d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 --- 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 20:50:10,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:50:10,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:50:10,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:50:10,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:50:10,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:50:10,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:50:10,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:50:10,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:50:10,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:50:10,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:50:10,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:50:10,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:50:10,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:50:10,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:50:10,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:50:10,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:50:10,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:50:10,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:50:10,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:50:10,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:50:10,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:50:10,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:50:10,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:50:10,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:50:10,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:50:10,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:50:10,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:50:10,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:50:10,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:50:10,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:50:10,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:50:10,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:50:10,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:50:10,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:50:10,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:50:10,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:50:10,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:50:10,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:50:10,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:50:10,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:50:10,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:50:10,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:50:10,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:50:10,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:50:10,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:50:10,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:50:10,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:50:10,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:50:10,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:50:10,914 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:50:10,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:50:10,914 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:50:10,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:50:10,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:50:10,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:50:10,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:50:10,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:50:10,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:50:10,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:50:10,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:50:10,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:50:10,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:50:10,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:50:10,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:50:10,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:50:10,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:10,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:50:10,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:50:10,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:50:10,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:50:10,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:50:10,918 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:50:10,918 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:50:10,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:50:10,919 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_fe10f1a6-7390-45b1-95b5-9cfc6c268825/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 [2022-11-18 20:50:11,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:50:11,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:50:11,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:50:11,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:50:11,286 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:50:11,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/reducercommutativity/sum40-2.i [2022-11-18 20:50:11,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/data/37ae2bf06/ad5ac142168142a08b9b24e43eaebaa4/FLAG3ebc541cd [2022-11-18 20:50:12,034 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:50:12,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/sv-benchmarks/c/reducercommutativity/sum40-2.i [2022-11-18 20:50:12,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/data/37ae2bf06/ad5ac142168142a08b9b24e43eaebaa4/FLAG3ebc541cd [2022-11-18 20:50:12,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/data/37ae2bf06/ad5ac142168142a08b9b24e43eaebaa4 [2022-11-18 20:50:12,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:50:12,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:50:12,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:12,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:50:12,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:50:12,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762251b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12, skipping insertion in model container [2022-11-18 20:50:12,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:50:12,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:50:12,663 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_fe10f1a6-7390-45b1-95b5-9cfc6c268825/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2022-11-18 20:50:12,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:12,677 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:50:12,700 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_fe10f1a6-7390-45b1-95b5-9cfc6c268825/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2022-11-18 20:50:12,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:12,717 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:50:12,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12 WrapperNode [2022-11-18 20:50:12,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:12,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:12,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:50:12,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:50:12,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,756 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-18 20:50:12,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:12,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:50:12,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:50:12,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:50:12,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:50:12,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:50:12,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:50:12,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:50:12,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (1/1) ... [2022-11-18 20:50:12,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:12,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:12,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:50:12,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:50:12,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:50:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-11-18 20:50:12,924 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-11-18 20:50:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:50:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:50:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:50:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:50:12,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:50:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:50:12,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:50:13,043 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:50:13,046 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:50:13,326 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:50:13,335 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:50:13,335 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:50:13,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:13 BoogieIcfgContainer [2022-11-18 20:50:13,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:50:13,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:50:13,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:50:13,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:50:13,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:50:12" (1/3) ... [2022-11-18 20:50:13,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473c81a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:13, skipping insertion in model container [2022-11-18 20:50:13,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:12" (2/3) ... [2022-11-18 20:50:13,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473c81a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:13, skipping insertion in model container [2022-11-18 20:50:13,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:13" (3/3) ... [2022-11-18 20:50:13,359 INFO L112 eAbstractionObserver]: Analyzing ICFG sum40-2.i [2022-11-18 20:50:13,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:50:13,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:50:13,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:50:13,450 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;@49a449fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:50:13,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:50:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:50:13,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:13,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:13,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-11-18 20:50:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:13,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165683891] [2022-11-18 20:50:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:13,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:50:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:13,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:50:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:50:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:50:13,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165683891] [2022-11-18 20:50:13,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165683891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:13,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423840935] [2022-11-18 20:50:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:13,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:13,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:13,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:50:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:50:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:50:14,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:14,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423840935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:14,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:50:14,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-18 20:50:14,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724871136] [2022-11-18 20:50:14,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:14,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:14,192 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:50:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:14,228 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-11-18 20:50:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:14,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-18 20:50:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:14,251 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:50:14,251 INFO L226 Difference]: Without dead ends: 24 [2022-11-18 20:50:14,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:14,259 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 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 20:50:14,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-18 20:50:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-18 20:50:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-18 20:50:14,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-11-18 20:50:14,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:14,295 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-18 20:50:14,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:50:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-18 20:50:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:50:14,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:14,297 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:14,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:14,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 20:50:14,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-11-18 20:50:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:14,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498570674] [2022-11-18 20:50:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:14,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:14,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:50:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:14,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:50:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:14,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-18 20:50:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:50:14,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:14,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498570674] [2022-11-18 20:50:14,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498570674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:14,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944147792] [2022-11-18 20:50:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:14,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:14,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:14,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:50:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:50:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:50:15,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:15,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944147792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:15,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:50:15,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-18 20:50:15,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94009329] [2022-11-18 20:50:15,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:15,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:15,017 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:50:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:15,030 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-18 20:50:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-18 20:50:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:15,031 INFO L225 Difference]: With dead ends: 42 [2022-11-18 20:50:15,031 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 20:50:15,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:15,033 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 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 20:50:15,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 20:50:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-18 20:50:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-18 20:50:15,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-11-18 20:50:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:15,041 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-18 20:50:15,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:50:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-18 20:50:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 20:50:15,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:15,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:15,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:50:15,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:15,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-11-18 20:50:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845739686] [2022-11-18 20:50:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:15,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:50:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-18 20:50:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 20:50:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:50:15,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845739686] [2022-11-18 20:50:15,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845739686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068680300] [2022-11-18 20:50:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:15,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:15,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:15,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:15,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:50:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:50:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:50:15,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:15,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068680300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:15,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:50:15,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-18 20:50:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87558494] [2022-11-18 20:50:15,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:50:15,512 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:50:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:15,540 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-18 20:50:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-11-18 20:50:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:15,544 INFO L225 Difference]: With dead ends: 39 [2022-11-18 20:50:15,544 INFO L226 Difference]: Without dead ends: 26 [2022-11-18 20:50:15,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:50:15,545 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:15,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-18 20:50:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-18 20:50:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-18 20:50:15,551 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-11-18 20:50:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:15,552 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-18 20:50:15,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:50:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-18 20:50:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:50:15,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:15,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:15,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:15,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:15,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-11-18 20:50:15,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:15,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103724410] [2022-11-18 20:50:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:15,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:50:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-18 20:50:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 20:50:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:50:15,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103724410] [2022-11-18 20:50:15,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103724410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670848032] [2022-11-18 20:50:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:15,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:15,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:15,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:15,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:50:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:50:16,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:50:16,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:50:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670848032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:16,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:16,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-18 20:50:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434329620] [2022-11-18 20:50:16,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:16,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:50:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:50:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:50:16,177 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:50:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:16,223 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-18 20:50:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:50:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-11-18 20:50:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:16,225 INFO L225 Difference]: With dead ends: 54 [2022-11-18 20:50:16,225 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 20:50:16,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:50:16,227 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:16,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 20:50:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-18 20:50:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-18 20:50:16,234 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-11-18 20:50:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:16,234 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-18 20:50:16,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:50:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-18 20:50:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:50:16,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:16,236 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:16,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:16,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:16,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-11-18 20:50:16,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:16,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342037249] [2022-11-18 20:50:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:16,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:50:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:50:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 20:50:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-18 20:50:16,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342037249] [2022-11-18 20:50:16,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342037249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420276280] [2022-11-18 20:50:16,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:50:16,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:16,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:16,569 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:16,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:50:16,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:50:16,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:50:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:50:16,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:50:16,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420276280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:16,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:16,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-18 20:50:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821518074] [2022-11-18 20:50:16,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:16,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:50:16,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:50:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:50:16,920 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:50:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:17,024 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-18 20:50:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:50:17,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-11-18 20:50:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:17,029 INFO L225 Difference]: With dead ends: 70 [2022-11-18 20:50:17,030 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 20:50:17,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:50:17,035 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:17,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 20:50:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-18 20:50:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-11-18 20:50:17,055 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-11-18 20:50:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:17,055 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-11-18 20:50:17,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:50:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-11-18 20:50:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:50:17,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:17,062 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:17,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:17,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:17,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-11-18 20:50:17,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:17,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522784097] [2022-11-18 20:50:17,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:50:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 20:50:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:50:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-18 20:50:17,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:17,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522784097] [2022-11-18 20:50:17,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522784097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:17,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925790722] [2022-11-18 20:50:17,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:50:17,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:17,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:17,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:17,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:50:17,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:50:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:17,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:50:17,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-18 20:50:17,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-18 20:50:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925790722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:17,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:17,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-18 20:50:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379408728] [2022-11-18 20:50:17,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:17,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:50:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:50:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:50:18,001 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:18,087 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-11-18 20:50:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:50:18,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-11-18 20:50:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:18,088 INFO L225 Difference]: With dead ends: 82 [2022-11-18 20:50:18,088 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 20:50:18,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:50:18,090 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:18,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 20:50:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-18 20:50:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-18 20:50:18,106 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-11-18 20:50:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:18,106 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-18 20:50:18,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-18 20:50:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 20:50:18,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:18,113 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:18,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:50:18,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2022-11-18 20:50:18,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:18,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372316407] [2022-11-18 20:50:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:18,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 20:50:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 20:50:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:50:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-18 20:50:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:18,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372316407] [2022-11-18 20:50:18,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372316407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:18,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869613497] [2022-11-18 20:50:18,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:50:18,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:18,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:18,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:50:18,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:50:18,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:18,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:50:18,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-18 20:50:18,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-18 20:50:19,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869613497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:19,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:19,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-11-18 20:50:19,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958208949] [2022-11-18 20:50:19,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:19,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:50:19,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:19,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:50:19,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:50:19,009 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:19,091 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-11-18 20:50:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:50:19,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-11-18 20:50:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:19,092 INFO L225 Difference]: With dead ends: 100 [2022-11-18 20:50:19,092 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:50:19,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:50:19,094 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:19,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:50:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-18 20:50:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-11-18 20:50:19,101 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-11-18 20:50:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:19,102 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-11-18 20:50:19,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-11-18 20:50:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-18 20:50:19,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:19,103 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:19,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:19,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:19,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2022-11-18 20:50:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920516480] [2022-11-18 20:50:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:19,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 20:50:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:19,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 20:50:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:19,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:50:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-11-18 20:50:19,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920516480] [2022-11-18 20:50:19,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920516480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332432437] [2022-11-18 20:50:19,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:50:19,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:19,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:19,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:19,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:50:20,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-18 20:50:20,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:50:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-18 20:50:20,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-18 20:50:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332432437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:20,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:20,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-11-18 20:50:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831831735] [2022-11-18 20:50:20,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:20,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:50:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:50:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:50:20,846 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:20,960 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-11-18 20:50:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:50:20,961 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-11-18 20:50:20,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:20,962 INFO L225 Difference]: With dead ends: 126 [2022-11-18 20:50:20,962 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:50:20,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:50:20,964 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:20,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:50:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-18 20:50:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-11-18 20:50:20,985 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-11-18 20:50:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:20,985 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-11-18 20:50:20,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-11-18 20:50:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-18 20:50:20,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:20,996 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:21,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:21,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:50:21,204 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2022-11-18 20:50:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:21,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93379575] [2022-11-18 20:50:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:21,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-18 20:50:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-18 20:50:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:21,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 20:50:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-11-18 20:50:21,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93379575] [2022-11-18 20:50:21,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93379575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:21,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678695446] [2022-11-18 20:50:21,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:50:21,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:21,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:21,760 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:21,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:50:22,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-18 20:50:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:50:22,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-11-18 20:50:22,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-11-18 20:50:22,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678695446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:22,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:22,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-11-18 20:50:22,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393496692] [2022-11-18 20:50:22,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:22,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:50:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:50:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:50:22,625 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:22,744 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-11-18 20:50:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:50:22,745 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-18 20:50:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:22,746 INFO L225 Difference]: With dead ends: 160 [2022-11-18 20:50:22,746 INFO L226 Difference]: Without dead ends: 104 [2022-11-18 20:50:22,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:50:22,748 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:22,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-18 20:50:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-11-18 20:50:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-11-18 20:50:22,757 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-11-18 20:50:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:22,757 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-11-18 20:50:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-11-18 20:50:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-18 20:50:22,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:22,760 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:22,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:22,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:22,967 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2022-11-18 20:50:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568400705] [2022-11-18 20:50:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:23,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-18 20:50:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:23,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-18 20:50:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 20:50:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-18 20:50:23,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568400705] [2022-11-18 20:50:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568400705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:23,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420802629] [2022-11-18 20:50:23,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:50:23,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:23,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:23,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:23,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:50:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:50:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-18 20:50:24,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-18 20:50:24,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420802629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:24,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:24,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-18 20:50:24,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302789517] [2022-11-18 20:50:24,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:24,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:50:24,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:24,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:50:24,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:50:24,543 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:50:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:24,686 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-11-18 20:50:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:50:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-11-18 20:50:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:24,688 INFO L225 Difference]: With dead ends: 207 [2022-11-18 20:50:24,688 INFO L226 Difference]: Without dead ends: 135 [2022-11-18 20:50:24,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:50:24,691 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:24,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-18 20:50:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-11-18 20:50:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-11-18 20:50:24,713 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-11-18 20:50:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:24,713 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-11-18 20:50:24,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:50:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-11-18 20:50:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-18 20:50:24,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:24,717 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:24,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:24,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:24,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2022-11-18 20:50:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:24,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235707187] [2022-11-18 20:50:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:24,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:26,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:50:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:26,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:50:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:26,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-11-18 20:50:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-18 20:50:26,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235707187] [2022-11-18 20:50:26,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235707187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193383028] [2022-11-18 20:50:26,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:50:26,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:26,663 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:26,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:50:26,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:50:26,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:50:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-18 20:50:27,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-18 20:50:28,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193383028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:28,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:28,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2022-11-18 20:50:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959079035] [2022-11-18 20:50:28,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:28,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:50:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:28,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:50:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:50:28,156 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:50:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:28,322 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2022-11-18 20:50:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:50:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-11-18 20:50:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:28,324 INFO L225 Difference]: With dead ends: 227 [2022-11-18 20:50:28,324 INFO L226 Difference]: Without dead ends: 155 [2022-11-18 20:50:28,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 22 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:50:28,326 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:28,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 156 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-18 20:50:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-11-18 20:50:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2022-11-18 20:50:28,339 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 200 [2022-11-18 20:50:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:28,339 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2022-11-18 20:50:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:50:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2022-11-18 20:50:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-18 20:50:28,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:28,343 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:28,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:28,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1781862573, now seen corresponding path program 9 times [2022-11-18 20:50:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:28,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369511910] [2022-11-18 20:50:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:28,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 20:50:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:29,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:50:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:29,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-18 20:50:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2022-11-18 20:50:29,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:29,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369511910] [2022-11-18 20:50:29,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369511910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385619909] [2022-11-18 20:50:29,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:50:29,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:29,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:29,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:50:32,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-18 20:50:32,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:32,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:50:32,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2022-11-18 20:50:32,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2022-11-18 20:50:33,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385619909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:33,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:33,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-11-18 20:50:33,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849722047] [2022-11-18 20:50:33,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:50:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:50:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:50:33,125 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:33,264 INFO L93 Difference]: Finished difference Result 258 states and 283 transitions. [2022-11-18 20:50:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:50:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 220 [2022-11-18 20:50:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:33,271 INFO L225 Difference]: With dead ends: 258 [2022-11-18 20:50:33,271 INFO L226 Difference]: Without dead ends: 187 [2022-11-18 20:50:33,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:50:33,273 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:33,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 90 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-18 20:50:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-11-18 20:50:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2022-11-18 20:50:33,288 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 220 [2022-11-18 20:50:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:33,290 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2022-11-18 20:50:33,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2022-11-18 20:50:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-18 20:50:33,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:33,297 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:33,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:50:33,509 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1749087027, now seen corresponding path program 10 times [2022-11-18 20:50:33,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:33,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385093037] [2022-11-18 20:50:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:34,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 20:50:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:35,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-11-18 20:50:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:35,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-11-18 20:50:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 0 proven. 4628 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2022-11-18 20:50:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:35,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385093037] [2022-11-18 20:50:35,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385093037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:35,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791980936] [2022-11-18 20:50:35,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:50:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:35,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:35,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:50:36,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:50:36,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:50:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 3728 proven. 900 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2022-11-18 20:50:36,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 3728 proven. 900 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2022-11-18 20:50:37,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791980936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:37,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:37,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 42 [2022-11-18 20:50:37,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709741054] [2022-11-18 20:50:37,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:37,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 20:50:37,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 20:50:37,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:50:37,446 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:37,611 INFO L93 Difference]: Finished difference Result 310 states and 329 transitions. [2022-11-18 20:50:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:50:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 316 [2022-11-18 20:50:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:37,613 INFO L225 Difference]: With dead ends: 310 [2022-11-18 20:50:37,613 INFO L226 Difference]: Without dead ends: 207 [2022-11-18 20:50:37,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 607 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:50:37,616 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:37,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 134 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-18 20:50:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-11-18 20:50:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:50:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2022-11-18 20:50:37,626 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 316 [2022-11-18 20:50:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:37,627 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2022-11-18 20:50:37,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:50:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2022-11-18 20:50:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-11-18 20:50:37,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:37,635 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:37,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:37,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:50:37,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash 176244895, now seen corresponding path program 11 times [2022-11-18 20:50:37,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:37,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144409006] [2022-11-18 20:50:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:38,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 20:50:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:38,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-11-18 20:50:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-11-18 20:50:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-11-18 20:50:38,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144409006] [2022-11-18 20:50:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144409006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691613339] [2022-11-18 20:50:38,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:50:38,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:38,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:38,914 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:38,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:53:25,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2022-11-18 20:53:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:53:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 6570 proven. 196 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2022-11-18 20:53:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-11-18 20:53:25,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691613339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:25,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:53:25,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-18 20:53:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310149329] [2022-11-18 20:53:25,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:25,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:53:25,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:53:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:53:25,680 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:53:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:25,833 INFO L93 Difference]: Finished difference Result 330 states and 350 transitions. [2022-11-18 20:53:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:53:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 376 [2022-11-18 20:53:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:25,836 INFO L225 Difference]: With dead ends: 330 [2022-11-18 20:53:25,837 INFO L226 Difference]: Without dead ends: 239 [2022-11-18 20:53:25,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:53:25,839 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:25,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:53:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-18 20:53:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-11-18 20:53:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:53:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 243 transitions. [2022-11-18 20:53:25,850 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 243 transitions. Word has length 376 [2022-11-18 20:53:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:25,851 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 243 transitions. [2022-11-18 20:53:25,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:53:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 243 transitions. [2022-11-18 20:53:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-11-18 20:53:25,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:25,861 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:25,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:26,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:53:26,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:53:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1634862719, now seen corresponding path program 12 times [2022-11-18 20:53:26,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47053472] [2022-11-18 20:53:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:26,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:28,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 20:53:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:28,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-11-18 20:53:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2022-11-18 20:53:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-11-18 20:53:28,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:28,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47053472] [2022-11-18 20:53:28,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47053472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703503493] [2022-11-18 20:53:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:53:28,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:28,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:28,232 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:53:28,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:54:55,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-11-18 20:54:55,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 20:54:55,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 6809 proven. 900 refuted. 0 times theorem prover too weak. 9446 trivial. 0 not checked. [2022-11-18 20:54:55,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-11-18 20:54:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703503493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:56,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:54:56,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 37, 33] total 46 [2022-11-18 20:54:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296137160] [2022-11-18 20:54:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:56,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:54:56,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:54:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=1199, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:54:56,312 INFO L87 Difference]: Start difference. First operand 239 states and 243 transitions. Second operand has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:54:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:57,641 INFO L93 Difference]: Finished difference Result 348 states and 361 transitions. [2022-11-18 20:54:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 20:54:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 408 [2022-11-18 20:54:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:57,644 INFO L225 Difference]: With dead ends: 348 [2022-11-18 20:54:57,644 INFO L226 Difference]: Without dead ends: 257 [2022-11-18 20:54:57,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 786 SyntacticMatches, 23 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2510, Invalid=4630, Unknown=0, NotChecked=0, Total=7140 [2022-11-18 20:54:57,648 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:57,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 109 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:54:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-18 20:54:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-11-18 20:54:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:54:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2022-11-18 20:54:57,660 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 408 [2022-11-18 20:54:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:57,661 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2022-11-18 20:54:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:54:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2022-11-18 20:54:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-11-18 20:54:57,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:57,665 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:57,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-18 20:54:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe10f1a6-7390-45b1-95b5-9cfc6c268825/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:54:57,879 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash -670252659, now seen corresponding path program 13 times [2022-11-18 20:54:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:57,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983903211] [2022-11-18 20:54:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat