./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF --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 a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:26:49,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:26:49,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:26:49,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:26:49,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:26:49,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:26:49,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:26:49,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:26:49,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:26:49,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:26:49,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:26:49,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:26:49,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:26:49,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:26:49,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:26:49,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:26:49,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:26:49,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:26:49,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:26:49,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:26:49,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:26:49,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:26:49,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:26:49,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:26:49,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:26:49,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:26:49,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:26:49,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:26:49,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:26:49,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:26:49,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:26:49,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:26:49,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:26:49,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:26:49,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:26:49,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:26:49,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:26:49,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:26:49,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:26:49,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:26:49,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:26:49,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:26:49,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:26:49,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:26:49,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:26:49,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:26:49,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:26:49,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:26:49,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:26:49,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:26:49,820 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:26:49,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:26:49,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:26:49,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:26:49,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:26:49,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:26:49,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:26:49,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:26:49,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:26:49,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:26:49,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:26:49,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:26:49,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:26:49,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:26:49,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:26:49,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:26:49,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:49,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:26:49,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:26:49,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:26:49,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:26:49,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:26:49,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:26:49,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:26:49,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:26:49,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:26:49,830 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_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 [2021-11-20 06:26:50,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:26:50,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:26:50,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:26:50,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:26:50,191 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:26:50,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-11-20 06:26:50,288 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/79c599e55/e78550f0010546aaa963eb751c71cfc3/FLAGdeb7af2e3 [2021-11-20 06:26:50,715 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:26:50,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-11-20 06:26:50,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/79c599e55/e78550f0010546aaa963eb751c71cfc3/FLAGdeb7af2e3 [2021-11-20 06:26:51,113 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/79c599e55/e78550f0010546aaa963eb751c71cfc3 [2021-11-20 06:26:51,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:26:51,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:26:51,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:51,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:26:51,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:26:51,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae6fed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51, skipping insertion in model container [2021-11-20 06:26:51,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:26:51,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:26:51,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[1224,1237] [2021-11-20 06:26:51,400 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[2827,2840] [2021-11-20 06:26:51,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:51,411 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:26:51,426 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[1224,1237] [2021-11-20 06:26:51,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[2827,2840] [2021-11-20 06:26:51,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:51,458 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:26:51,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51 WrapperNode [2021-11-20 06:26:51,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:51,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:51,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:26:51,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:26:51,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,521 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2021-11-20 06:26:51,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:51,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:26:51,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:26:51,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:26:51,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:26:51,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:26:51,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:26:51,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:26:51,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (1/1) ... [2021-11-20 06:26:51,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:51,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:51,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:26:51,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:26:51,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:26:51,609 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-20 06:26:51,609 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-20 06:26:51,610 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-20 06:26:51,610 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-20 06:26:51,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:26:51,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:26:51,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:26:51,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:26:51,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:26:51,669 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:26:51,670 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:26:51,845 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:26:51,852 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:26:51,852 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:26:51,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:26:51 BoogieIcfgContainer [2021-11-20 06:26:51,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:26:51,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:26:51,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:26:51,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:26:51,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:26:51" (1/3) ... [2021-11-20 06:26:51,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b27233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:26:51, skipping insertion in model container [2021-11-20 06:26:51,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:51" (2/3) ... [2021-11-20 06:26:51,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b27233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:26:51, skipping insertion in model container [2021-11-20 06:26:51,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:26:51" (3/3) ... [2021-11-20 06:26:51,862 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_3.i [2021-11-20 06:26:51,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:26:51,867 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:26:51,915 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:26:51,923 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:26:51,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:26:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 06:26:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:26:51,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:51,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:51,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-11-20 06:26:51,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:51,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675699725] [2021-11-20 06:26:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:51,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:52,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:52,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675699725] [2021-11-20 06:26:52,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675699725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:52,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:52,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:26:52,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910122079] [2021-11-20 06:26:52,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:52,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:26:52,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:26:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:26:52,273 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:52,317 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2021-11-20 06:26:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:26:52,320 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:26:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:52,328 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:26:52,329 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 06:26:52,332 INFO L932 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 [2021-11-20 06:26:52,336 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:52,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 92 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 06:26:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-20 06:26:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:26:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-20 06:26:52,381 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 11 [2021-11-20 06:26:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:52,381 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-20 06:26:52,382 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-20 06:26:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:26:52,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:52,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:52,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:26:52,385 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash -5472198, now seen corresponding path program 1 times [2021-11-20 06:26:52,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36502972] [2021-11-20 06:26:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:52,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:52,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36502972] [2021-11-20 06:26:52,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36502972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:52,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:52,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:26:52,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390083684] [2021-11-20 06:26:52,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:52,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:26:52,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:26:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:26:52,459 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:52,506 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-11-20 06:26:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:26:52,507 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:26:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:52,511 INFO L225 Difference]: With dead ends: 64 [2021-11-20 06:26:52,511 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 06:26:52,515 INFO L932 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 [2021-11-20 06:26:52,518 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:52,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 06:26:52,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-11-20 06:26:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:26:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-20 06:26:52,532 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 11 [2021-11-20 06:26:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:52,533 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-20 06:26:52,533 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-20 06:26:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:26:52,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:52,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:52,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:26:52,535 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-11-20 06:26:52,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:52,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562186308] [2021-11-20 06:26:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:52,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:52,551 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:26:52,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561660426] [2021-11-20 06:26:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:52,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:52,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:52,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:52,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:26:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:26:52,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:52,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:52,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:52,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562186308] [2021-11-20 06:26:52,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:26:52,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561660426] [2021-11-20 06:26:52,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561660426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:52,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:26:52,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 06:26:52,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979353172] [2021-11-20 06:26:52,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:52,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:26:52,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:52,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:26:52,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:26:52,938 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:53,010 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-11-20 06:26:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:26:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:53,012 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:26:53,013 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 06:26:53,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:26:53,014 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:53,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 06:26:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-20 06:26:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:26:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-20 06:26:53,023 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2021-11-20 06:26:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:53,024 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-20 06:26:53,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-20 06:26:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:26:53,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:53,036 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:53,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:53,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:53,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2021-11-20 06:26:53,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:53,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940697809] [2021-11-20 06:26:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:53,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:53,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:26:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173430327] [2021-11-20 06:26:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:53,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:53,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:53,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:53,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:26:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:26:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:53,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:53,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:53,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940697809] [2021-11-20 06:26:53,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:26:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173430327] [2021-11-20 06:26:53,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173430327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:53,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:26:53,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:26:53,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061759924] [2021-11-20 06:26:53,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:53,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:26:53,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:26:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:26:53,726 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:53,799 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-20 06:26:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 06:26:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:53,804 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:26:53,805 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 06:26:53,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:26:53,806 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:53,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 165 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:53,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 06:26:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-20 06:26:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:26:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-20 06:26:53,814 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2021-11-20 06:26:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:53,815 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-20 06:26:53,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-20 06:26:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:26:53,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:53,816 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:53,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:54,047 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-11-20 06:26:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:54,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977181813] [2021-11-20 06:26:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:54,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:54,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:26:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216184049] [2021-11-20 06:26:54,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:26:54,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:54,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:54,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:26:54,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:26:54,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:26:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:54,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:54,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:54,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977181813] [2021-11-20 06:26:54,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:26:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216184049] [2021-11-20 06:26:54,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216184049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:54,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:26:54,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 06:26:54,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071117818] [2021-11-20 06:26:54,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:54,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:26:54,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:26:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:26:54,455 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:54,583 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-11-20 06:26:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:26:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:26:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:54,584 INFO L225 Difference]: With dead ends: 65 [2021-11-20 06:26:54,584 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 06:26:54,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:54,586 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:54,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 196 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 06:26:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-20 06:26:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:26:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-20 06:26:54,596 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2021-11-20 06:26:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:54,598 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-20 06:26:54,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-20 06:26:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:26:54,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:54,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:54,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:26:54,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:54,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2021-11-20 06:26:54,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:54,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951241721] [2021-11-20 06:26:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:54,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:26:54,813 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:26:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:26:54,839 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:26:54,839 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:26:54,840 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-20 06:26:54,842 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-20 06:26:54,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:26:54,845 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-11-20 06:26:54,848 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:26:54,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:26:54 BoogieIcfgContainer [2021-11-20 06:26:54,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:26:54,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:26:54,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:26:54,873 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:26:54,873 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:26:51" (3/4) ... [2021-11-20 06:26:54,876 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:26:54,876 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:26:54,877 INFO L158 Benchmark]: Toolchain (without parser) took 3759.04ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 71.2MB in the beginning and 51.6MB in the end (delta: 19.6MB). Peak memory consumption was 44.1MB. Max. memory is 16.1GB. [2021-11-20 06:26:54,877 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 104.9MB. Free memory was 60.2MB in the beginning and 60.1MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:26:54,878 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.32ms. Allocated memory is still 104.9MB. Free memory was 71.0MB in the beginning and 78.0MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:26:54,878 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.38ms. Allocated memory is still 104.9MB. Free memory was 78.0MB in the beginning and 76.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:26:54,879 INFO L158 Benchmark]: Boogie Preprocessor took 22.77ms. Allocated memory is still 104.9MB. Free memory was 76.3MB in the beginning and 75.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:26:54,879 INFO L158 Benchmark]: RCFGBuilder took 308.78ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 64.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:26:54,880 INFO L158 Benchmark]: TraceAbstraction took 3016.67ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 63.8MB in the beginning and 51.6MB in the end (delta: 12.2MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. [2021-11-20 06:26:54,880 INFO L158 Benchmark]: Witness Printer took 3.74ms. Allocated memory is still 132.1MB. Free memory was 51.6MB in the beginning and 51.6MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:26:54,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 104.9MB. Free memory was 60.2MB in the beginning and 60.1MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.32ms. Allocated memory is still 104.9MB. Free memory was 71.0MB in the beginning and 78.0MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.38ms. Allocated memory is still 104.9MB. Free memory was 78.0MB in the beginning and 76.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.77ms. Allocated memory is still 104.9MB. Free memory was 76.3MB in the beginning and 75.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 308.78ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 64.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3016.67ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 63.8MB in the beginning and 51.6MB in the end (delta: 12.2MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. * Witness Printer took 3.74ms. Allocated memory is still 132.1MB. Free memory was 51.6MB in the beginning and 51.6MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. * 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 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L100] CALL, EXPR f(IN) VAL [\old(x)=54] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=54, x=54] [L100] RET, EXPR f(IN) VAL [f(IN)=49, IN=54] [L100] CALL, EXPR fp(IN) VAL [\old(x)=54] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=54, x=54] [L100] RET, EXPR fp(IN) VAL [f(IN)=49, fp(IN)=50, IN=54] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=52] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR f(x) VAL [f(x)=51, IN=54, x=52] [L102] CALL, EXPR fp(x) VAL [\old(x)=52] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR fp(x) VAL [f(x)=51, fp(x)=53, IN=54, x=52] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=54] [L109] reach_error() VAL [IN=54] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 626 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 430 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 145 IncrementalHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 196 mSDtfsCounter, 145 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 422 SizeOfPredicates, 17 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/52 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-20 06:26:54,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF --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 a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:26:57,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:26:57,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:26:57,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:26:57,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:26:57,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:26:57,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:26:57,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:26:57,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:26:57,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:26:57,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:26:57,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:26:57,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:26:57,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:26:57,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:26:57,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:26:57,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:26:57,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:26:57,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:26:57,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:26:57,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:26:57,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:26:57,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:26:57,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:26:57,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:26:57,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:26:57,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:26:57,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:26:57,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:26:57,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:26:57,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:26:57,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:26:57,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:26:57,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:26:57,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:26:57,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:26:57,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:26:57,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:26:57,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:26:57,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:26:57,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:26:57,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 06:26:57,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:26:57,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:26:57,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:26:57,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:26:57,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:26:57,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:26:57,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:26:57,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:26:57,696 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:26:57,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:26:57,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:26:57,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:26:57,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:26:57,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:26:57,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:26:57,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:26:57,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:26:57,698 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:26:57,698 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:26:57,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:26:57,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:26:57,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:26:57,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:26:57,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:26:57,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:26:57,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:26:57,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:57,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:26:57,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:26:57,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:26:57,706 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:26:57,706 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:26:57,706 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:26:57,706 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:26:57,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:26:57,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:26:57,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:26:57,708 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8b52922fdfe93dd417523e4e63c80c50c6631dbe5ff22aa1a5e25c09a617278 [2021-11-20 06:26:58,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:26:58,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:26:58,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:26:58,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:26:58,163 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:26:58,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-11-20 06:26:58,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/d725fd579/817dd69d7f114626981ab01fb4cbd152/FLAG1417b8e7e [2021-11-20 06:26:58,822 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:26:58,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i [2021-11-20 06:26:58,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/d725fd579/817dd69d7f114626981ab01fb4cbd152/FLAG1417b8e7e [2021-11-20 06:26:59,149 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/data/d725fd579/817dd69d7f114626981ab01fb4cbd152 [2021-11-20 06:26:59,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:26:59,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:26:59,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:59,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:26:59,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:26:59,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5b13bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59, skipping insertion in model container [2021-11-20 06:26:59,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:26:59,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:26:59,348 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[1224,1237] [2021-11-20 06:26:59,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[2827,2840] [2021-11-20 06:26:59,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:59,422 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:26:59,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[1224,1237] [2021-11-20 06:26:59,469 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/sv-benchmarks/c/combinations/gcd_4+newton_2_3.i[2827,2840] [2021-11-20 06:26:59,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:59,487 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:26:59,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59 WrapperNode [2021-11-20 06:26:59,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:59,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:59,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:26:59,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:26:59,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,530 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2021-11-20 06:26:59,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:59,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:26:59,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:26:59,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:26:59,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:26:59,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:26:59,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:26:59,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:26:59,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (1/1) ... [2021-11-20 06:26:59,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:59,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:59,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:26:59,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:26:59,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:26:59,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:26:59,678 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-20 06:26:59,679 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-20 06:26:59,679 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-20 06:26:59,679 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-20 06:26:59,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:26:59,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:26:59,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:26:59,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:26:59,752 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:26:59,754 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:27:08,954 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:27:08,962 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:27:08,963 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:27:08,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:08 BoogieIcfgContainer [2021-11-20 06:27:08,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:27:08,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:27:08,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:27:08,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:27:08,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:26:59" (1/3) ... [2021-11-20 06:27:08,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1c579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:08, skipping insertion in model container [2021-11-20 06:27:08,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:59" (2/3) ... [2021-11-20 06:27:08,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1c579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:08, skipping insertion in model container [2021-11-20 06:27:08,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:08" (3/3) ... [2021-11-20 06:27:08,999 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_3.i [2021-11-20 06:27:09,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:27:09,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:27:09,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:27:09,062 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:27:09,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:27:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 06:27:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:27:09,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:09,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:09,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-11-20 06:27:09,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:27:09,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883491577] [2021-11-20 06:27:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:09,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:27:09,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:27:09,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:27:09,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:27:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:27:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:09,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:09,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:27:09,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883491577] [2021-11-20 06:27:09,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883491577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:09,566 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:09,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 06:27:09,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373292721] [2021-11-20 06:27:09,569 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:09,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:27:09,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:27:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:27:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:09,618 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:09,769 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-11-20 06:27:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:27:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:09,787 INFO L225 Difference]: With dead ends: 93 [2021-11-20 06:27:09,787 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 06:27:09,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:09,806 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:09,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 134 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 06:27:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-11-20 06:27:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:27:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-20 06:27:09,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-11-20 06:27:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:09,852 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-20 06:27:09,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-20 06:27:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:27:09,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:09,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:09,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:10,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:27:10,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2021-11-20 06:27:10,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:27:10,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823989103] [2021-11-20 06:27:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:10,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:27:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:27:10,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:27:10,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:27:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:27:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:10,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:10,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:27:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823989103] [2021-11-20 06:27:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823989103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:10,470 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:10,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 06:27:10,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872123902] [2021-11-20 06:27:10,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:10,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:27:10,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:27:10,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:27:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:10,473 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:10,708 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-11-20 06:27:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:27:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 06:27:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:10,716 INFO L225 Difference]: With dead ends: 52 [2021-11-20 06:27:10,716 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 06:27:10,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:10,719 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:10,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 06:27:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 06:27:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:27:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-20 06:27:10,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-11-20 06:27:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:10,732 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-20 06:27:10,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-20 06:27:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:27:10,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:10,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:10,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 06:27:10,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:27:10,939 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-11-20 06:27:10,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:27:10,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598188874] [2021-11-20 06:27:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:10,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:27:10,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:27:10,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:27:10,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:27:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:11,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:27:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:11,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:11,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:27:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598188874] [2021-11-20 06:27:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598188874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:11,589 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:11,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 06:27:11,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933722880] [2021-11-20 06:27:11,590 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:11,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:27:11,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:27:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:27:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:11,592 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:11,739 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-11-20 06:27:11,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:27:11,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:27:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:11,743 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:27:11,743 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 06:27:11,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:11,745 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:11,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 06:27:11,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-20 06:27:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:27:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-20 06:27:11,756 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2021-11-20 06:27:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:11,757 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-20 06:27:11,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-20 06:27:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:27:11,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:11,767 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:11,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:11,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:27:11,987 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2021-11-20 06:27:11,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:27:11,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844690367] [2021-11-20 06:27:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:11,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:27:11,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:27:11,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:27:11,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:27:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:27:12,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:12,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:13,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:27:13,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844690367] [2021-11-20 06:27:13,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844690367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:13,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:13,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:27:13,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433555865] [2021-11-20 06:27:13,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:13,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:13,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:27:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:13,191 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:13,530 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-20 06:27:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 06:27:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:13,533 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:27:13,533 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 06:27:13,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:13,535 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:13,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 164 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:27:13,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 06:27:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-20 06:27:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:27:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-20 06:27:13,545 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2021-11-20 06:27:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:13,545 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-20 06:27:13,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-20 06:27:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:27:13,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:13,547 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:13,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:13,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:27:13,762 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-11-20 06:27:13,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:27:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326689009] [2021-11-20 06:27:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:13,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:27:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:27:13,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:27:13,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:27:13,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:13,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:27:13,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:23,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:27:23,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326689009] [2021-11-20 06:27:23,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326689009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:23,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:23,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 06:27:23,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653938174] [2021-11-20 06:27:23,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:23,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:27:23,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:27:23,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:27:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:27:23,945 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:42,480 WARN L227 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:27:59,816 WARN L227 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:28:19,845 WARN L227 SmtUtils]: Spent 11.17s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:28:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:23,365 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2021-11-20 06:28:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:28:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:28:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:23,398 INFO L225 Difference]: With dead ends: 68 [2021-11-20 06:28:23,398 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:28:23,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=118, Invalid=531, Unknown=1, NotChecked=0, Total=650 [2021-11-20 06:28:23,400 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:23,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 339 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 06:28:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:28:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-11-20 06:28:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 06:28:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-11-20 06:28:23,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 21 [2021-11-20 06:28:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:23,417 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-11-20 06:28:23,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-11-20 06:28:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:28:23,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:23,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:23,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:23,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:23,635 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2021-11-20 06:28:23,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:23,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212700399] [2021-11-20 06:28:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:23,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:23,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:23,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9473742d-5a33-4c01-b088-9a35aafd407e/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process