./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0 --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 a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:27:52,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:27:52,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:27:52,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:27:52,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:27:52,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:27:52,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:27:52,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:27:52,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:27:52,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:27:52,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:27:52,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:27:52,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:27:52,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:27:52,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:27:52,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:27:52,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:27:52,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:27:52,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:27:52,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:27:52,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:27:52,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:27:52,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:27:52,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:27:52,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:27:52,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:27:52,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:27:52,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:27:52,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:27:52,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:27:52,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:27:52,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:27:52,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:27:52,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:27:52,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:27:52,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:27:52,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:27:52,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:27:52,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:27:52,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:27:52,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:27:52,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:27:52,776 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:27:52,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:27:52,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:27:52,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:27:52,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:27:52,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:27:52,778 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:27:52,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:27:52,779 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:27:52,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:27:52,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:27:52,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:27:52,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:27:52,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:27:52,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:27:52,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:27:52,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:27:52,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:27:52,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:27:52,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:27:52,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:27:52,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:27:52,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:27:52,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:27:52,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:27:52,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:27:52,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:27:52,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:27:52,784 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:27:52,784 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:27:52,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:27:52,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:27:52,785 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_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 [2021-11-22 15:27:53,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:27:53,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:27:53,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:27:53,105 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:27:53,108 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:27:53,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-11-22 15:27:53,192 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/data/086f5ce1d/ca52b51f15b5462b971ac94a728b918f/FLAG2491a973a [2021-11-22 15:27:53,798 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:27:53,799 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-11-22 15:27:53,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/data/086f5ce1d/ca52b51f15b5462b971ac94a728b918f/FLAG2491a973a [2021-11-22 15:27:54,178 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/data/086f5ce1d/ca52b51f15b5462b971ac94a728b918f [2021-11-22 15:27:54,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:27:54,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:27:54,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:27:54,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:27:54,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:27:54,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54, skipping insertion in model container [2021-11-22 15:27:54,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:27:54,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:27:54,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2021-11-22 15:27:54,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:27:54,461 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:27:54,474 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2021-11-22 15:27:54,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:27:54,504 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:27:54,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54 WrapperNode [2021-11-22 15:27:54,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:27:54,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:27:54,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:27:54,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:27:54,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,556 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 104 [2021-11-22 15:27:54,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:27:54,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:27:54,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:27:54,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:27:54,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:27:54,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:27:54,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:27:54,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:27:54,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (1/1) ... [2021-11-22 15:27:54,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:27:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:27:54,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:27:54,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:27:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:27:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:27:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:27:54,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:27:54,766 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:27:54,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:27:55,043 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:27:55,050 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:27:55,051 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 15:27:55,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:27:55 BoogieIcfgContainer [2021-11-22 15:27:55,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:27:55,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:27:55,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:27:55,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:27:55,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:27:54" (1/3) ... [2021-11-22 15:27:55,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3471a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:27:55, skipping insertion in model container [2021-11-22 15:27:55,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:27:54" (2/3) ... [2021-11-22 15:27:55,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3471a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:27:55, skipping insertion in model container [2021-11-22 15:27:55,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:27:55" (3/3) ... [2021-11-22 15:27:55,077 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2021-11-22 15:27:55,082 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:27:55,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-22 15:27:55,141 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:27:55,150 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:27:55,151 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-22 15:27:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 50 states have internal predecessors, (68), 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) [2021-11-22 15:27:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:27:55,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:27:55,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:27:55,180 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-22 15:27:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:27:55,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1235857098, now seen corresponding path program 1 times [2021-11-22 15:27:55,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:27:55,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522693974] [2021-11-22 15:27:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:27:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:27:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:27:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:27:55,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:27:55,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522693974] [2021-11-22 15:27:55,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522693974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:27:55,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:27:55,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:27:55,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599434828] [2021-11-22 15:27:55,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:27:55,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:27:55,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:27:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:27:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:27:55,430 INFO L87 Difference]: Start difference. First operand has 51 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 50 states have internal predecessors, (68), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-22 15:27:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:27:55,455 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2021-11-22 15:27:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:27:55,457 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-11-22 15:27:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:27:55,467 INFO L225 Difference]: With dead ends: 99 [2021-11-22 15:27:55,468 INFO L226 Difference]: Without dead ends: 47 [2021-11-22 15:27:55,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:27:55,476 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:27:55,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:27:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-22 15:27:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-22 15:27:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 46 states have internal predecessors, (49), 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) [2021-11-22 15:27:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-22 15:27:55,519 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 10 [2021-11-22 15:27:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:27:55,519 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-22 15:27:55,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-22 15:27:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-22 15:27:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:27:55,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:27:55,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:27:55,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:27:55,522 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-22 15:27:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:27:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1503620767, now seen corresponding path program 1 times [2021-11-22 15:27:55,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:27:55,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638609018] [2021-11-22 15:27:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:27:55,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:27:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:27:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:27:55,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:27:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638609018] [2021-11-22 15:27:55,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638609018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:27:55,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:27:55,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:27:55,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695940659] [2021-11-22 15:27:55,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:27:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:27:55,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:27:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:27:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:27:55,894 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-22 15:27:58,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:00,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:00,513 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-11-22 15:28:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:28:00,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 [2021-11-22 15:28:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:00,517 INFO L225 Difference]: With dead ends: 125 [2021-11-22 15:28:00,517 INFO L226 Difference]: Without dead ends: 86 [2021-11-22 15:28:00,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:28:00,521 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 63 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:00,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 116 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-11-22 15:28:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-22 15:28:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2021-11-22 15:28:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 62 states have internal predecessors, (71), 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) [2021-11-22 15:28:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-11-22 15:28:00,551 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 11 [2021-11-22 15:28:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:00,551 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-11-22 15:28:00,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-22 15:28:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-11-22 15:28:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 15:28:00,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:00,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:00,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:28:00,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-22 15:28:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1870389148, now seen corresponding path program 1 times [2021-11-22 15:28:00,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338385421] [2021-11-22 15:28:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:00,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:00,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:28:00,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045996567] [2021-11-22 15:28:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:00,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:00,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:00,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:28:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:28:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:28:00,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:28:00,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:00,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338385421] [2021-11-22 15:28:00,837 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:28:00,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045996567] [2021-11-22 15:28:00,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045996567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:28:00,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:28:00,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:28:00,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720380193] [2021-11-22 15:28:00,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:28:00,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:28:00,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:28:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:28:00,841 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-22 15:28:03,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:03,764 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2021-11-22 15:28:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:28:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 13 [2021-11-22 15:28:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:03,766 INFO L225 Difference]: With dead ends: 104 [2021-11-22 15:28:03,766 INFO L226 Difference]: Without dead ends: 88 [2021-11-22 15:28:03,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:28:03,768 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:03,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 83 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-22 15:28:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-22 15:28:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-11-22 15:28:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 79 states have internal predecessors, (88), 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) [2021-11-22 15:28:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-22 15:28:03,788 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 13 [2021-11-22 15:28:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:03,789 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-22 15:28:03,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-22 15:28:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-22 15:28:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 15:28:03,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:03,791 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:03,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:04,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:04,005 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-22 15:28:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1828543716, now seen corresponding path program 1 times [2021-11-22 15:28:04,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:04,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503220329] [2021-11-22 15:28:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:04,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:28:04,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:04,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503220329] [2021-11-22 15:28:04,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503220329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343838532] [2021-11-22 15:28:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:04,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:04,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:04,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:28:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:04,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:28:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:28:04,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:28:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:28:04,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343838532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:28:04,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:28:04,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-22 15:28:04,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592293401] [2021-11-22 15:28:04,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:28:04,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:28:04,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:28:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:28:04,819 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2021-11-22 15:28:07,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:10,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 15:28:15,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:17,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:20,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:21,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:24,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:26,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:29,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:31,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:33,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:36,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:38,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:38,423 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-11-22 15:28:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:28:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 13 [2021-11-22 15:28:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:38,425 INFO L225 Difference]: With dead ends: 160 [2021-11-22 15:28:38,425 INFO L226 Difference]: Without dead ends: 102 [2021-11-22 15:28:38,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-11-22 15:28:38,427 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 169 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 94 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 299 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 181 Invalid, 11 Unknown, 0 Unchecked, 33.2s Time] [2021-11-22 15:28:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-22 15:28:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2021-11-22 15:28:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.2) internal successors, (102), 93 states have internal predecessors, (102), 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) [2021-11-22 15:28:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-11-22 15:28:38,443 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 13 [2021-11-22 15:28:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:38,443 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-11-22 15:28:38,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2021-11-22 15:28:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-11-22 15:28:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 15:28:38,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:38,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:38,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 15:28:38,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:38,658 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-22 15:28:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2147482631, now seen corresponding path program 1 times [2021-11-22 15:28:38,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:38,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265404718] [2021-11-22 15:28:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:38,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:38,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:28:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864322328] [2021-11-22 15:28:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:38,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:38,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:38,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:38,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:28:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:28:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:28:38,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:28:38,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:38,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265404718] [2021-11-22 15:28:38,883 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:28:38,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864322328] [2021-11-22 15:28:38,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864322328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:28:38,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:28:38,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:28:38,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087675345] [2021-11-22 15:28:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:28:38,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:28:38,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:28:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:28:38,886 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-11-22 15:28:41,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:41,383 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-11-22 15:28:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:28:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) Word has length 15 [2021-11-22 15:28:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:41,385 INFO L225 Difference]: With dead ends: 100 [2021-11-22 15:28:41,385 INFO L226 Difference]: Without dead ends: 80 [2021-11-22 15:28:41,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:28:41,386 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:41,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 89 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-22 15:28:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-22 15:28:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-22 15:28:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 79 states have internal predecessors, (86), 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) [2021-11-22 15:28:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-22 15:28:41,401 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 15 [2021-11-22 15:28:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:41,402 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-22 15:28:41,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-11-22 15:28:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-22 15:28:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:28:41,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:41,403 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:41,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:41,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:41,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-22 15:28:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:41,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1165801538, now seen corresponding path program 1 times [2021-11-22 15:28:41,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:41,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262142523] [2021-11-22 15:28:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:41,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:41,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:28:41,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313696030] [2021-11-22 15:28:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:41,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:41,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:41,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:41,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:28:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:41,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:28:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:28:41,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:28:41,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:41,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262142523] [2021-11-22 15:28:41,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:28:41,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313696030] [2021-11-22 15:28:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313696030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:28:41,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:28:41,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:28:41,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721918752] [2021-11-22 15:28:41,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:28:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:28:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:28:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:28:41,858 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-22 15:28:44,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:46,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:28:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:46,926 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-11-22 15:28:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:28:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 [2021-11-22 15:28:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:46,928 INFO L225 Difference]: With dead ends: 82 [2021-11-22 15:28:46,928 INFO L226 Difference]: Without dead ends: 80 [2021-11-22 15:28:46,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:28:46,931 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:46,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2021-11-22 15:28:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-22 15:28:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-22 15:28:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 79 states have internal predecessors, (85), 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) [2021-11-22 15:28:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-11-22 15:28:46,941 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 17 [2021-11-22 15:28:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:46,941 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-11-22 15:28:46,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-22 15:28:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-11-22 15:28:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 15:28:46,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:46,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:46,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-22 15:28:47,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-22 15:28:47,143 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-22 15:28:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash 265596604, now seen corresponding path program 1 times [2021-11-22 15:28:47,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:47,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394701906] [2021-11-22 15:28:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:47,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:47,162 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:28:47,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238278758] [2021-11-22 15:28:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:47,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:47,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:47,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:47,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_871eed5b-bbe3-4317-8034-643a761d487b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process