./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8 --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 46307615818d6371ae296fa4995def50a9373bd159748713204d6c22dd4af97e --- 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-e04fb08 [2022-11-16 11:46:55,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:46:55,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:46:55,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:46:55,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:46:55,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:46:55,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:46:55,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:46:55,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:46:55,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:46:55,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:46:55,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:46:55,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:46:55,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:46:55,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:46:55,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:46:55,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:46:55,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:46:55,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:46:55,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:46:55,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:46:55,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:46:55,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:46:55,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:46:55,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:46:55,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:46:55,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:46:55,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:46:55,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:46:55,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:46:55,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:46:55,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:46:55,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:46:55,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:46:55,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:46:55,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:46:55,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:46:55,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:46:55,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:46:55,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:46:55,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:46:55,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:46:55,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:46:55,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:46:55,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:46:55,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:46:55,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:46:55,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:46:55,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:46:55,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:46:55,759 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:46:55,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:46:55,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:46:55,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:46:55,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:46:55,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:46:55,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:46:55,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:46:55,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:46:55,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:46:55,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:46:55,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:46:55,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:46:55,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:46:55,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:46:55,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:46:55,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:46:55,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:46:55,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:46:55,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:46:55,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:46:55,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:46:55,767 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:46:55,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:46:55,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:46:55,768 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_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46307615818d6371ae296fa4995def50a9373bd159748713204d6c22dd4af97e [2022-11-16 11:46:56,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:46:56,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:46:56,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:46:56,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:46:56,185 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:46:56,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2022-11-16 11:46:56,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/data/428274c6a/f5f76d1390454370ba13415dbed798c7/FLAG29edc0313 [2022-11-16 11:46:56,882 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:46:56,882 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2022-11-16 11:46:56,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/data/428274c6a/f5f76d1390454370ba13415dbed798c7/FLAG29edc0313 [2022-11-16 11:46:57,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/data/428274c6a/f5f76d1390454370ba13415dbed798c7 [2022-11-16 11:46:57,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:46:57,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:46:57,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:46:57,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:46:57,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:46:57,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c8d82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57, skipping insertion in model container [2022-11-16 11:46:57,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:46:57,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:46:57,582 WARN L229 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_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] [2022-11-16 11:46:57,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:46:57,649 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:46:57,682 WARN L229 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_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] [2022-11-16 11:46:57,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:46:57,722 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:46:57,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57 WrapperNode [2022-11-16 11:46:57,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:46:57,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:46:57,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:46:57,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:46:57,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,767 INFO L138 Inliner]: procedures = 16, calls = 49, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 163 [2022-11-16 11:46:57,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:46:57,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:46:57,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:46:57,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:46:57,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,808 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:46:57,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:46:57,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:46:57,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:46:57,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (1/1) ... [2022-11-16 11:46:57,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:46:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:57,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:46:57,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:46:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:46:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:46:57,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:46:57,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:46:57,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:46:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:46:57,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:46:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:46:58,058 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:46:58,060 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:46:58,390 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:46:58,411 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:46:58,412 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-16 11:46:58,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:46:58 BoogieIcfgContainer [2022-11-16 11:46:58,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:46:58,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:46:58,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:46:58,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:46:58,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:46:57" (1/3) ... [2022-11-16 11:46:58,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:46:58, skipping insertion in model container [2022-11-16 11:46:58,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:46:57" (2/3) ... [2022-11-16 11:46:58,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:46:58, skipping insertion in model container [2022-11-16 11:46:58,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:46:58" (3/3) ... [2022-11-16 11:46:58,441 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2022-11-16 11:46:58,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:46:58,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:46:58,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:46:58,581 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;@1bd5fcb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:46:58,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:46:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:46:58,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:58,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:58,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:46:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1647230389, now seen corresponding path program 1 times [2022-11-16 11:46:58,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533495266] [2022-11-16 11:46:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:58,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:59,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:59,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533495266] [2022-11-16 11:46:59,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533495266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:59,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:46:59,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:46:59,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371965088] [2022-11-16 11:46:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:46:59,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:46:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:46:59,212 INFO L87 Difference]: Start difference. First operand has 36 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:59,275 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2022-11-16 11:46:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:46:59,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:46:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:59,296 INFO L225 Difference]: With dead ends: 70 [2022-11-16 11:46:59,298 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 11:46:59,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:46:59,308 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 82 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 [2022-11-16 11:46:59,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 82 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:46:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 11:46:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-16 11:46:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-11-16 11:46:59,377 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2022-11-16 11:46:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:59,377 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-11-16 11:46:59,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-11-16 11:46:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:46:59,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:59,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:59,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:46:59,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:46:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash -212862985, now seen corresponding path program 1 times [2022-11-16 11:46:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:59,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175965564] [2022-11-16 11:46:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:59,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:59,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175965564] [2022-11-16 11:46:59,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175965564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066069427] [2022-11-16 11:46:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:59,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:59,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:59,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:46:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:46:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:59,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:46:59,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066069427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:59,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:46:59,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-16 11:46:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600272679] [2022-11-16 11:46:59,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:59,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:46:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:46:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:46:59,873 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:00,009 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-11-16 11:47:00,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:47:00,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 11:47:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:00,011 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:47:00,012 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:47:00,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:47:00,014 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:00,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:47:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:47:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-11-16 11:47:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-11-16 11:47:00,024 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2022-11-16 11:47:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:00,024 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-11-16 11:47:00,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-11-16 11:47:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:47:00,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:00,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:00,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:00,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:00,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1047765161, now seen corresponding path program 1 times [2022-11-16 11:47:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:00,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129519333] [2022-11-16 11:47:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:00,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:47:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129519333] [2022-11-16 11:47:00,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129519333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:00,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38780694] [2022-11-16 11:47:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:00,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:00,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:00,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:00,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:47:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:47:00,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:47:00,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:47:00,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38780694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:00,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:00,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:47:00,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97681362] [2022-11-16 11:47:00,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:00,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:47:00,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:47:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:47:00,839 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:00,912 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2022-11-16 11:47:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:47:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 11:47:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:00,916 INFO L225 Difference]: With dead ends: 81 [2022-11-16 11:47:00,918 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 11:47:00,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:47:00,922 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:00,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:47:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 11:47:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 11:47:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-16 11:47:00,936 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2022-11-16 11:47:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:00,937 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-16 11:47:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-16 11:47:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:47:00,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:00,944 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:00,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:47:01,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:01,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:01,152 INFO L85 PathProgramCache]: Analyzing trace with hash -76527901, now seen corresponding path program 2 times [2022-11-16 11:47:01,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:01,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760954340] [2022-11-16 11:47:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:01,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:47:01,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:01,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760954340] [2022-11-16 11:47:01,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760954340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:01,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277666687] [2022-11-16 11:47:01,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:47:01,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:01,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:01,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:47:01,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:47:01,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:01,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:47:01,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:47:01,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:47:01,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277666687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:01,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:01,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:47:01,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407569741] [2022-11-16 11:47:01,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:01,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:47:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:47:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:47:01,589 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:01,820 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-11-16 11:47:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:47:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-16 11:47:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:01,822 INFO L225 Difference]: With dead ends: 119 [2022-11-16 11:47:01,823 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 11:47:01,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:47:01,824 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:01,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 59 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:47:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 11:47:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 11:47:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-11-16 11:47:01,837 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 43 [2022-11-16 11:47:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:01,837 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-11-16 11:47:01,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-11-16 11:47:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-16 11:47:01,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:01,840 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:01,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:02,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:02,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash 932289401, now seen corresponding path program 3 times [2022-11-16 11:47:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:02,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382231859] [2022-11-16 11:47:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:02,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 11:47:02,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382231859] [2022-11-16 11:47:02,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382231859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122146280] [2022-11-16 11:47:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:47:02,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:02,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:02,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:02,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:47:04,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:47:04,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:47:04,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 11:47:04,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 11:47:04,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122146280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:04,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:04,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-16 11:47:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269836618] [2022-11-16 11:47:04,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:04,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:47:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:47:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:47:04,277 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:04,864 INFO L93 Difference]: Finished difference Result 252 states and 310 transitions. [2022-11-16 11:47:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:47:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-16 11:47:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:04,866 INFO L225 Difference]: With dead ends: 252 [2022-11-16 11:47:04,866 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 11:47:04,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:47:04,868 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:04,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 170 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:47:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 11:47:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-11-16 11:47:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0520231213872833) internal successors, (182), 173 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 182 transitions. [2022-11-16 11:47:04,886 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 182 transitions. Word has length 85 [2022-11-16 11:47:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:04,887 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 182 transitions. [2022-11-16 11:47:04,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 182 transitions. [2022-11-16 11:47:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-16 11:47:04,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:04,890 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:04,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:05,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1857988451, now seen corresponding path program 4 times [2022-11-16 11:47:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:05,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148489696] [2022-11-16 11:47:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-16 11:47:05,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:05,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148489696] [2022-11-16 11:47:05,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148489696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615794521] [2022-11-16 11:47:05,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:47:05,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:05,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:05,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:47:05,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:47:05,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:47:05,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-16 11:47:06,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-16 11:47:06,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615794521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:06,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:06,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-16 11:47:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36009640] [2022-11-16 11:47:06,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:06,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:47:06,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:06,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:47:06,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:47:06,176 INFO L87 Difference]: Start difference. First operand 174 states and 182 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:06,260 INFO L93 Difference]: Finished difference Result 349 states and 371 transitions. [2022-11-16 11:47:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:47:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-16 11:47:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:06,265 INFO L225 Difference]: With dead ends: 349 [2022-11-16 11:47:06,265 INFO L226 Difference]: Without dead ends: 188 [2022-11-16 11:47:06,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:47:06,268 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:06,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:47:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-16 11:47:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-16 11:47:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0481283422459893) internal successors, (196), 187 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 196 transitions. [2022-11-16 11:47:06,284 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 196 transitions. Word has length 171 [2022-11-16 11:47:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:06,285 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 196 transitions. [2022-11-16 11:47:06,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 196 transitions. [2022-11-16 11:47:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-16 11:47:06,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:06,289 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:06,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:06,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:06,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash 727181845, now seen corresponding path program 5 times [2022-11-16 11:47:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:06,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467386873] [2022-11-16 11:47:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:06,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-16 11:47:07,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467386873] [2022-11-16 11:47:07,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467386873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663655843] [2022-11-16 11:47:07,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:47:07,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:07,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:07,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:07,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710dd9c0-e5bd-4d95-ae10-04aba3c633e9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process