./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/ddlm2013.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/ddlm2013.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD --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 65bd222d84b3d0ffad0fae15432ef5f02ecc91b1ed6d337cf01ace7c551e4ada ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:33:53,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:33:53,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:33:53,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:33:53,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:33:53,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:33:53,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:33:53,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:33:53,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:33:53,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:33:53,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:33:53,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:33:53,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:33:53,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:33:53,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:33:53,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:33:53,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:33:53,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:33:53,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:33:53,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:33:53,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:33:53,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:33:53,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:33:53,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:33:53,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:33:53,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:33:53,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:33:53,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:33:53,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:33:53,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:33:53,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:33:53,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:33:53,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:33:53,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:33:53,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:33:53,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:33:53,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:33:53,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:33:53,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:33:53,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:33:53,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:33:53,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:33:53,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:33:53,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:33:53,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:33:53,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:33:53,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:33:53,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:33:53,935 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:33:53,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:33:53,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:33:53,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:33:53,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:33:53,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:33:53,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:33:53,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:33:53,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:33:53,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:33:53,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:33:53,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:33:53,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:33:53,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:33:53,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:33:53,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:33:53,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:33:53,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:33:53,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:33:53,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:33:53,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:33:53,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:33:53,955 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:33:53,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:33:53,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:33:53,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:33:53,958 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_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65bd222d84b3d0ffad0fae15432ef5f02ecc91b1ed6d337cf01ace7c551e4ada [2021-10-28 23:33:54,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:33:54,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:33:54,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:33:54,415 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:33:54,416 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:33:54,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/loop-lit/ddlm2013.i [2021-10-28 23:33:54,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/data/694aa03c1/a8eec5540b6c43fdbd10af59eeb4c32a/FLAG2c4ff7414 [2021-10-28 23:33:55,092 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:33:55,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/sv-benchmarks/c/loop-lit/ddlm2013.i [2021-10-28 23:33:55,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/data/694aa03c1/a8eec5540b6c43fdbd10af59eeb4c32a/FLAG2c4ff7414 [2021-10-28 23:33:55,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/data/694aa03c1/a8eec5540b6c43fdbd10af59eeb4c32a [2021-10-28 23:33:55,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:33:55,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:33:55,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:33:55,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:33:55,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:33:55,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65bc88d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55, skipping insertion in model container [2021-10-28 23:33:55,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:33:55,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:33:55,719 WARN L228 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_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] [2021-10-28 23:33:55,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:33:55,751 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:33:55,767 WARN L228 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_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] [2021-10-28 23:33:55,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:33:55,792 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:33:55,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55 WrapperNode [2021-10-28 23:33:55,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:33:55,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:33:55,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:33:55,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:33:55,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:33:55,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:33:55,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:33:55,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:33:55,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:33:55,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:33:55,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:33:55,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:33:55,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (1/1) ... [2021-10-28 23:33:55,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:33:55,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:33:55,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:33:55,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:33:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:33:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:33:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:33:55,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:33:56,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:33:56,187 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 23:33:56,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:33:56 BoogieIcfgContainer [2021-10-28 23:33:56,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:33:56,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:33:56,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:33:56,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:33:56,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:33:55" (1/3) ... [2021-10-28 23:33:56,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee9d5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:33:56, skipping insertion in model container [2021-10-28 23:33:56,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:33:55" (2/3) ... [2021-10-28 23:33:56,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee9d5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:33:56, skipping insertion in model container [2021-10-28 23:33:56,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:33:56" (3/3) ... [2021-10-28 23:33:56,204 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2021-10-28 23:33:56,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:33:56,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:33:56,273 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:33:56,283 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 [2021-10-28 23:33:56,283 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:33:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) 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) [2021-10-28 23:33:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 23:33:56,308 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:33:56,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:33:56,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:33:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:33:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1805459912, now seen corresponding path program 1 times [2021-10-28 23:33:56,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:33:56,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356639397] [2021-10-28 23:33:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:33:56,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:33:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:33:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:33:56,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:33:56,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356639397] [2021-10-28 23:33:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356639397] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:33:56,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:33:56,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:33:56,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98002579] [2021-10-28 23:33:56,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:33:56,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:33:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:33:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:33:56,641 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 23:33:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:33:56,664 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-10-28 23:33:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:33:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2021-10-28 23:33:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:33:56,679 INFO L225 Difference]: With dead ends: 22 [2021-10-28 23:33:56,679 INFO L226 Difference]: Without dead ends: 10 [2021-10-28 23:33:56,684 INFO L786 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 [2021-10-28 23:33:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-28 23:33:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-28 23:33:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2021-10-28 23:33:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-28 23:33:56,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-28 23:33:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:33:56,728 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-28 23:33:56,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 23:33:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-28 23:33:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 23:33:56,730 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:33:56,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:33:56,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:33:56,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:33:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:33:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 122256666, now seen corresponding path program 1 times [2021-10-28 23:33:56,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:33:56,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833481075] [2021-10-28 23:33:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:33:56,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:33:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:33:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:33:57,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:33:57,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833481075] [2021-10-28 23:33:57,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833481075] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:33:57,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:33:57,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:33:57,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736344518] [2021-10-28 23:33:57,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:33:57,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:33:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:33:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:33:57,052 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-28 23:33:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:33:57,113 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-28 23:33:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:33:57,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 [2021-10-28 23:33:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:33:57,115 INFO L225 Difference]: With dead ends: 16 [2021-10-28 23:33:57,116 INFO L226 Difference]: Without dead ends: 12 [2021-10-28 23:33:57,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:33:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-28 23:33:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-28 23:33:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-10-28 23:33:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-28 23:33:57,121 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2021-10-28 23:33:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:33:57,121 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-28 23:33:57,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-28 23:33:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-10-28 23:33:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:33:57,123 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:33:57,123 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:33:57,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:33:57,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:33:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:33:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1514407247, now seen corresponding path program 1 times [2021-10-28 23:33:57,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:33:57,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032528005] [2021-10-28 23:33:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:33:57,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:33:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:33:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:33:57,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:33:57,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032528005] [2021-10-28 23:33:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032528005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:33:57,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348086948] [2021-10-28 23:33:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:33:57,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:33:57,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:33:57,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:33:57,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:33:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:33:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:33:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:33:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:33:58,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348086948] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:33:58,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:33:58,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-10-28 23:33:58,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178688088] [2021-10-28 23:33:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:33:58,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:33:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:33:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:33:58,081 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-10-28 23:33:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:33:58,188 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-28 23:33:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:33:58,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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 [2021-10-28 23:33:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:33:58,192 INFO L225 Difference]: With dead ends: 21 [2021-10-28 23:33:58,192 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 23:33:58,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:33:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 23:33:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-10-28 23:33:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-10-28 23:33:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-28 23:33:58,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-10-28 23:33:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:33:58,203 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-28 23:33:58,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-10-28 23:33:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-28 23:33:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:33:58,204 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:33:58,205 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:33:58,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:33:58,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:33:58,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:33:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:33:58,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2100501679, now seen corresponding path program 1 times [2021-10-28 23:33:58,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:33:58,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414711729] [2021-10-28 23:33:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:33:58,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:33:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:33:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:33:58,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:33:58,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414711729] [2021-10-28 23:33:58,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414711729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:33:58,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:33:58,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:33:58,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708544781] [2021-10-28 23:33:58,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:33:58,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:33:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:33:58,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:33:58,469 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-10-28 23:33:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:33:58,476 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-10-28 23:33:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:33:58,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11 [2021-10-28 23:33:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:33:58,478 INFO L225 Difference]: With dead ends: 24 [2021-10-28 23:33:58,478 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 23:33:58,479 INFO L786 BasicCegarLoop]: 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 [2021-10-28 23:33:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 23:33:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 23:33:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-10-28 23:33:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-28 23:33:58,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-10-28 23:33:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:33:58,483 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-28 23:33:58,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-10-28 23:33:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-28 23:33:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 23:33:58,484 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:33:58,485 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:33:58,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:33:58,485 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:33:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:33:58,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1426811654, now seen corresponding path program 2 times [2021-10-28 23:33:58,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:33:58,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623385308] [2021-10-28 23:33:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:33:58,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:33:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:33:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:33:58,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:33:58,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623385308] [2021-10-28 23:33:58,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623385308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:33:58,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042407124] [2021-10-28 23:33:58,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:33:58,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:33:58,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:33:58,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:33:58,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:33:58,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:33:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:33:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:33:58,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:33:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:33:59,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042407124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:33:59,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:33:59,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-28 23:33:59,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733304436] [2021-10-28 23:33:59,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:33:59,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:33:59,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:33:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:33:59,062 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:33:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:33:59,174 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-10-28 23:33:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:33:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 23:33:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:33:59,176 INFO L225 Difference]: With dead ends: 29 [2021-10-28 23:33:59,176 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 23:33:59,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:33:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 23:33:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 23:33:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-10-28 23:33:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-28 23:33:59,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-10-28 23:33:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:33:59,181 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-28 23:33:59,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:33:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-28 23:33:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 23:33:59,183 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:33:59,183 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:33:59,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:33:59,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:33:59,393 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:33:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:33:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1651285649, now seen corresponding path program 3 times [2021-10-28 23:33:59,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:33:59,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922394889] [2021-10-28 23:33:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:33:59,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:33:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:33:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:33:59,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:33:59,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922394889] [2021-10-28 23:33:59,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922394889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:33:59,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902659878] [2021-10-28 23:33:59,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:33:59,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:33:59,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:33:59,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:33:59,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:33:59,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:33:59,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:33:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:33:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:34:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:34:00,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902659878] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:34:00,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:34:00,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-28 23:34:00,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834681653] [2021-10-28 23:34:00,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:34:00,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:34:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:34:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:34:00,260 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-10-28 23:34:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:34:00,655 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-10-28 23:34:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:34:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 [2021-10-28 23:34:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:34:00,657 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:34:00,657 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 23:34:00,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:34:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 23:34:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-10-28 23:34:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-10-28 23:34:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-28 23:34:00,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2021-10-28 23:34:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:34:00,665 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-28 23:34:00,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-10-28 23:34:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-28 23:34:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:34:00,667 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:34:00,667 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:34:00,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:00,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:34:00,888 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:34:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1011932452, now seen corresponding path program 1 times [2021-10-28 23:34:00,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:00,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358555010] [2021-10-28 23:34:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:00,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:34:01,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:34:01,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358555010] [2021-10-28 23:34:01,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358555010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:34:01,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494187839] [2021-10-28 23:34:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:01,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:34:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:01,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:34:01,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:34:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:34:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:34:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:34:01,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494187839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:34:01,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:34:01,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 23:34:01,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279329590] [2021-10-28 23:34:01,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:34:01,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:34:01,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:34:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:34:01,314 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-28 23:34:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:34:01,401 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-10-28 23:34:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:34:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 20 [2021-10-28 23:34:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:34:01,403 INFO L225 Difference]: With dead ends: 36 [2021-10-28 23:34:01,403 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 23:34:01,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:34:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 23:34:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 23:34:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2021-10-28 23:34:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-10-28 23:34:01,407 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2021-10-28 23:34:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:34:01,408 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-10-28 23:34:01,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2021-10-28 23:34:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-10-28 23:34:01,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:34:01,409 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:34:01,409 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:34:01,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:01,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:34:01,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:34:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1903391558, now seen corresponding path program 4 times [2021-10-28 23:34:01,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:01,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215760999] [2021-10-28 23:34:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:01,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:34:02,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:34:02,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215760999] [2021-10-28 23:34:02,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215760999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:34:02,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234995530] [2021-10-28 23:34:02,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:34:02,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:34:02,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:02,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:34:02,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:34:02,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:34:02,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:34:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 23:34:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:34:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:34:03,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234995530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:34:03,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:34:03,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-10-28 23:34:03,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315532024] [2021-10-28 23:34:03,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:34:03,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:34:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:34:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:34:03,283 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 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) [2021-10-28 23:34:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:34:03,950 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-28 23:34:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:34:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 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 26 [2021-10-28 23:34:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:34:03,952 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:34:03,952 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:34:03,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:34:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:34:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:34:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-28 23:34:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:34:03,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-10-28 23:34:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:34:03,955 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:34:03,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 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) [2021-10-28 23:34:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:34:03,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:34:03,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:34:04,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:34:04,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 23:34:04,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:34:04,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:34:04,179 INFO L857 garLoopResultBuilder]: For program point L35-2(lines 24 49) no Hoare annotation was computed. [2021-10-28 23:34:04,180 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 23:34:04,180 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-28 23:34:04,180 INFO L860 garLoopResultBuilder]: At program point L48(lines 24 49) the Hoare annotation is: true [2021-10-28 23:34:04,180 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 23:34:04,180 INFO L857 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2021-10-28 23:34:04,180 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 23:34:04,180 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 23:34:04,180 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-28 23:34:04,181 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-28 23:34:04,181 INFO L860 garLoopResultBuilder]: At program point L45(lines 45 47) the Hoare annotation is: true [2021-10-28 23:34:04,181 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 43) no Hoare annotation was computed. [2021-10-28 23:34:04,181 INFO L857 garLoopResultBuilder]: For program point L39-2(lines 24 49) no Hoare annotation was computed. [2021-10-28 23:34:04,181 INFO L857 garLoopResultBuilder]: For program point L35(lines 35 44) no Hoare annotation was computed. [2021-10-28 23:34:04,184 INFO L731 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2021-10-28 23:34:04,186 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:34:04,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:34:04 BoogieIcfgContainer [2021-10-28 23:34:04,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:34:04,197 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:34:04,198 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:34:04,198 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:34:04,198 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:33:56" (3/4) ... [2021-10-28 23:34:04,201 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:34:04,212 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 23:34:04,212 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:34:04,213 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:34:04,213 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:34:04,263 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:34:04,264 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:34:04,266 INFO L168 Benchmark]: Toolchain (without parser) took 8809.41 ms. Allocated memory was 121.6 MB in the beginning and 167.8 MB in the end (delta: 46.1 MB). Free memory was 81.6 MB in the beginning and 128.4 MB in the end (delta: -46.8 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:04,267 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 98.1 MB in the end (delta: 78.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:34:04,267 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.42 ms. Allocated memory is still 121.6 MB. Free memory was 81.5 MB in the beginning and 96.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:04,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.55 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 94.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:34:04,269 INFO L168 Benchmark]: Boogie Preprocessor took 27.45 ms. Allocated memory is still 121.6 MB. Free memory was 94.7 MB in the beginning and 93.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:04,269 INFO L168 Benchmark]: RCFGBuilder took 324.33 ms. Allocated memory is still 121.6 MB. Free memory was 93.5 MB in the beginning and 83.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:04,270 INFO L168 Benchmark]: TraceAbstraction took 8004.33 ms. Allocated memory was 121.6 MB in the beginning and 167.8 MB in the end (delta: 46.1 MB). Free memory was 83.5 MB in the beginning and 130.6 MB in the end (delta: -47.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:04,270 INFO L168 Benchmark]: Witness Printer took 66.66 ms. Allocated memory is still 167.8 MB. Free memory was 130.6 MB in the beginning and 128.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:04,274 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 98.1 MB in the end (delta: 78.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.42 ms. Allocated memory is still 121.6 MB. Free memory was 81.5 MB in the beginning and 96.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.55 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 94.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.45 ms. Allocated memory is still 121.6 MB. Free memory was 94.7 MB in the beginning and 93.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 324.33 ms. Allocated memory is still 121.6 MB. Free memory was 93.5 MB in the beginning and 83.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8004.33 ms. Allocated memory was 121.6 MB in the beginning and 167.8 MB in the end (delta: 46.1 MB). Free memory was 83.5 MB in the beginning and 130.6 MB in the end (delta: -47.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Witness Printer took 66.66 ms. Allocated memory is still 167.8 MB. Free memory was 130.6 MB in the beginning and 128.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.9s, OverallIterations: 8, TraceHistogramMax: 7, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 62 SDslu, 353 SDs, 0 SdLazy, 460 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 2132 SizeOfPredicates, 17 NumberOfNonLiveVariables, 457 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 36/216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-28 23:34:04,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ea4d3b-f53a-4e48-b564-0e4b0d256f24/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...