./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init1_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/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_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init1_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/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_b3470c7a-5ae4-475f-abb8-78279ae88cf1/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 f3516892ee2b21e8ecfb58de859daab8a3f4cb53e76493a39d9f7eca6aa47ee2 --- 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 12:28:10,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:28:10,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:28:10,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:28:10,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:28:10,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:28:10,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:28:10,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:28:10,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:28:10,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:28:10,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:28:10,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:28:10,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:28:10,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:28:10,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:28:10,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:28:10,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:28:10,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:28:10,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:28:10,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:28:10,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:28:10,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:28:10,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:28:10,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:28:10,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:28:10,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:28:10,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:28:10,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:28:10,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:28:10,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:28:10,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:28:10,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:28:10,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:28:10,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:28:10,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:28:10,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:28:10,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:28:10,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:28:10,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:28:10,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:28:10,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:28:10,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:28:10,829 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:28:10,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:28:10,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:28:10,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:28:10,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:28:10,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:28:10,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:28:10,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:28:10,833 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:28:10,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:28:10,834 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:28:10,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:28:10,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:28:10,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:28:10,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:28:10,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:28:10,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:28:10,836 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:28:10,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:28:10,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:28:10,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:28:10,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:28:10,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:28:10,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:28:10,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:28:10,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:28:10,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:28:10,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:28:10,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:28:10,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:28:10,840 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:28:10,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:28:10,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:28:10,841 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_b3470c7a-5ae4-475f-abb8-78279ae88cf1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3516892ee2b21e8ecfb58de859daab8a3f4cb53e76493a39d9f7eca6aa47ee2 [2022-11-16 12:28:11,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:28:11,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:28:11,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:28:11,196 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:28:11,197 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:28:11,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-examples/standard_init1_ground-2.i [2022-11-16 12:28:11,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/data/7df5305df/8e89b03f685844fd95f4a449a8f5ef8f/FLAGd35aa8588 [2022-11-16 12:28:11,891 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:28:11,891 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/sv-benchmarks/c/array-examples/standard_init1_ground-2.i [2022-11-16 12:28:11,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/data/7df5305df/8e89b03f685844fd95f4a449a8f5ef8f/FLAGd35aa8588 [2022-11-16 12:28:12,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/data/7df5305df/8e89b03f685844fd95f4a449a8f5ef8f [2022-11-16 12:28:12,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:28:12,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:28:12,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:28:12,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:28:12,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:28:12,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c7d787e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12, skipping insertion in model container [2022-11-16 12:28:12,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:28:12,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:28:12,521 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_b3470c7a-5ae4-475f-abb8-78279ae88cf1/sv-benchmarks/c/array-examples/standard_init1_ground-2.i[816,829] [2022-11-16 12:28:12,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:28:12,544 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:28:12,556 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_b3470c7a-5ae4-475f-abb8-78279ae88cf1/sv-benchmarks/c/array-examples/standard_init1_ground-2.i[816,829] [2022-11-16 12:28:12,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:28:12,578 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:28:12,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12 WrapperNode [2022-11-16 12:28:12,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:28:12,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:28:12,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:28:12,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:28:12,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,621 INFO L138 Inliner]: procedures = 15, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2022-11-16 12:28:12,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:28:12,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:28:12,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:28:12,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:28:12,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:28:12,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:28:12,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:28:12,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:28:12,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (1/1) ... [2022-11-16 12:28:12,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:28:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:12,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:28:12,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:28:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:28:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:28:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:28:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:28:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:28:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:28:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:28:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:28:12,820 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:28:12,822 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:28:12,964 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:28:12,971 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:28:12,971 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:28:12,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:28:12 BoogieIcfgContainer [2022-11-16 12:28:12,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:28:12,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:28:12,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:28:12,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:28:12,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:28:12" (1/3) ... [2022-11-16 12:28:12,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dae028c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:28:12, skipping insertion in model container [2022-11-16 12:28:12,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:12" (2/3) ... [2022-11-16 12:28:12,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dae028c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:28:12, skipping insertion in model container [2022-11-16 12:28:12,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:28:12" (3/3) ... [2022-11-16 12:28:12,986 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2022-11-16 12:28:13,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:28:13,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:28:13,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:28:13,071 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;@756c6429, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:28:13,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:28:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 12:28:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:28:13,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:13,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:13,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:13,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2022-11-16 12:28:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:13,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190841962] [2022-11-16 12:28:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:13,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:13,343 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 12:28:13,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:13,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190841962] [2022-11-16 12:28:13,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190841962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:28:13,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:28:13,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:28:13,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247717694] [2022-11-16 12:28:13,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:28:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:28:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:28:13,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:28:13,408 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12:28:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:13,449 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2022-11-16 12:28:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:28:13,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-16 12:28:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:13,464 INFO L225 Difference]: With dead ends: 26 [2022-11-16 12:28:13,465 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 12:28:13,469 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 12:28:13,475 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:13,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:28:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 12:28:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-16 12:28:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 12:28:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-16 12:28:13,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2022-11-16 12:28:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:13,536 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-16 12:28:13,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12:28:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-16 12:28:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:28:13,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:13,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:13,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:28:13,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:13,542 INFO L85 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2022-11-16 12:28:13,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:13,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087897838] [2022-11-16 12:28:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:13,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:13,705 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 12:28:13,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:13,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087897838] [2022-11-16 12:28:13,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087897838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:13,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985163321] [2022-11-16 12:28:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:13,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:13,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:13,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:13,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:28:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:13,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:28:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:13,943 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 12:28:13,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:14,003 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 12:28:14,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985163321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:14,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:14,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 12:28:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150488678] [2022-11-16 12:28:14,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:14,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:28:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:28:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:28:14,015 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 12:28:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:14,062 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-16 12:28:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:28:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 8 [2022-11-16 12:28:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:14,064 INFO L225 Difference]: With dead ends: 21 [2022-11-16 12:28:14,064 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 12:28:14,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 12:28:14,067 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:14,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:28:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 12:28:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-16 12:28:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 12:28:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-16 12:28:14,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 8 [2022-11-16 12:28:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:14,073 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-16 12:28:14,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 12:28:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-16 12:28:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:28:14,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:14,075 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:14,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:14,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:14,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:14,286 INFO L85 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 2 times [2022-11-16 12:28:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:14,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284868119] [2022-11-16 12:28:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:14,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:14,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:14,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284868119] [2022-11-16 12:28:14,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284868119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530834713] [2022-11-16 12:28:14,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:28:14,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:14,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:14,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:14,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:28:14,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:28:14,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:14,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:28:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:14,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:14,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530834713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:14,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:14,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-16 12:28:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085694113] [2022-11-16 12:28:14,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:28:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:28:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:28:14,715 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 12:28:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:14,785 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-11-16 12:28:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:28:14,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 11 [2022-11-16 12:28:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:14,787 INFO L225 Difference]: With dead ends: 27 [2022-11-16 12:28:14,788 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 12:28:14,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:28:14,791 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:14,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:28:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 12:28:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-16 12:28:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 12:28:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-16 12:28:14,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2022-11-16 12:28:14,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:14,808 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-16 12:28:14,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 12:28:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-16 12:28:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:28:14,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:14,812 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:14,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:15,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:15,019 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 3 times [2022-11-16 12:28:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313015542] [2022-11-16 12:28:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313015542] [2022-11-16 12:28:15,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313015542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330077925] [2022-11-16 12:28:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:28:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:15,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:15,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:28:15,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:28:15,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:28:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:15,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330077925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:16,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:16,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-16 12:28:16,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238883803] [2022-11-16 12:28:16,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:16,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:28:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:28:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:28:16,019 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 12:28:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:16,080 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-11-16 12:28:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:28:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 17 [2022-11-16 12:28:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:16,082 INFO L225 Difference]: With dead ends: 39 [2022-11-16 12:28:16,082 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 12:28:16,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:28:16,084 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:16,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:28:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 12:28:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-16 12:28:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 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 12:28:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-11-16 12:28:16,092 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 17 [2022-11-16 12:28:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:16,092 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-11-16 12:28:16,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 12:28:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-11-16 12:28:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:28:16,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:16,094 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:16,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:16,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:16,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 4 times [2022-11-16 12:28:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:16,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973532671] [2022-11-16 12:28:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:16,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:17,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973532671] [2022-11-16 12:28:17,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973532671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248435854] [2022-11-16 12:28:17,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:28:17,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:17,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:17,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:17,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:28:17,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:28:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:28:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:17,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248435854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:18,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:18,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-16 12:28:18,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791404418] [2022-11-16 12:28:18,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:18,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:28:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:18,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:28:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:28:18,576 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 12:28:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:18,716 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2022-11-16 12:28:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:28:18,717 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 29 [2022-11-16 12:28:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:18,723 INFO L225 Difference]: With dead ends: 63 [2022-11-16 12:28:18,723 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 12:28:18,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:28:18,726 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:18,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:28:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 12:28:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-16 12:28:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 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 12:28:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-11-16 12:28:18,738 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 29 [2022-11-16 12:28:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:18,738 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-11-16 12:28:18,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 12:28:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-11-16 12:28:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 12:28:18,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:18,741 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:18,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:18,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:18,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:18,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1684000368, now seen corresponding path program 5 times [2022-11-16 12:28:18,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:18,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120326773] [2022-11-16 12:28:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:21,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120326773] [2022-11-16 12:28:21,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120326773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964850151] [2022-11-16 12:28:21,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:28:21,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:21,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:21,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:21,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:28:33,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-16 12:28:33,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:33,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 12:28:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:34,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:37,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964850151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:37,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:37,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-11-16 12:28:37,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472933306] [2022-11-16 12:28:37,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:37,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-16 12:28:37,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:37,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-16 12:28:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 12:28:37,831 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 12:28:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:38,197 INFO L93 Difference]: Finished difference Result 111 states and 160 transitions. [2022-11-16 12:28:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 12:28:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 53 [2022-11-16 12:28:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:38,202 INFO L225 Difference]: With dead ends: 111 [2022-11-16 12:28:38,203 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 12:28:38,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 12:28:38,209 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:38,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:28:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 12:28:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-11-16 12:28:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 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 12:28:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-11-16 12:28:38,238 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 53 [2022-11-16 12:28:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:38,239 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-11-16 12:28:38,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 12:28:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-11-16 12:28:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 12:28:38,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:38,243 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:38,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:38,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:38,444 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:28:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash -765599888, now seen corresponding path program 6 times [2022-11-16 12:28:38,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:38,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936235991] [2022-11-16 12:28:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:45,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936235991] [2022-11-16 12:28:45,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936235991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463213425] [2022-11-16 12:28:45,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:28:45,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:45,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:45,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:45,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3470c7a-5ae4-475f-abb8-78279ae88cf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process