./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:16:39,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:16:39,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:16:39,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:16:39,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:16:39,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:16:39,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:16:39,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:16:39,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:16:39,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:16:39,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:16:39,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:16:39,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:16:39,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:16:39,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:16:39,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:16:39,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:16:39,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:16:39,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:16:39,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:16:39,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:16:39,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:16:39,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:16:39,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:16:39,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:16:39,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:16:39,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:16:39,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:16:39,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:16:39,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:16:39,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:16:39,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:16:39,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:16:39,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:16:39,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:16:39,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:16:39,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:16:39,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:16:39,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:16:39,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:16:39,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:16:39,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:16:39,807 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:16:39,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:16:39,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:16:39,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:16:39,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:16:39,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:16:39,809 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:16:39,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:16:39,810 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:16:39,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:16:39,810 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:16:39,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:16:39,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:16:39,811 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:16:39,811 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:16:39,812 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:16:39,812 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:16:39,812 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:16:39,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:16:39,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:16:39,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:16:39,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:16:39,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:16:39,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:16:39,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:16:39,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:16:39,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:16:39,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:16:39,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:16:39,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:16:39,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:16:39,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:16:39,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:39,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:16:39,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:16:39,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:16:39,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:16:39,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:16:39,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:16:39,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:16:39,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:16:39,819 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2021-11-23 17:16:40,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:16:40,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:16:40,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:16:40,099 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:16:40,100 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:16:40,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-11-23 17:16:40,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/95fc95848/78f0bf7ab06a42d2ac3c43b08e4edcb2/FLAG08eb91f94 [2021-11-23 17:16:40,680 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:16:40,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-11-23 17:16:40,686 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/95fc95848/78f0bf7ab06a42d2ac3c43b08e4edcb2/FLAG08eb91f94 [2021-11-23 17:16:41,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/95fc95848/78f0bf7ab06a42d2ac3c43b08e4edcb2 [2021-11-23 17:16:41,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:16:41,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:16:41,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:41,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:16:41,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:16:41,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6a461b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41, skipping insertion in model container [2021-11-23 17:16:41,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:16:41,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:16:41,301 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_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2021-11-23 17:16:41,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:41,328 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:16:41,342 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_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2021-11-23 17:16:41,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:41,362 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:16:41,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41 WrapperNode [2021-11-23 17:16:41,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:41,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:41,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:16:41,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:16:41,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,406 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-11-23 17:16:41,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:41,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:16:41,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:16:41,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:16:41,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:16:41,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:16:41,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:16:41,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:16:41,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:41" (1/1) ... [2021-11-23 17:16:41,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:41,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:41,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:16:41,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:16:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:16:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:16:41,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:16:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:16:41,623 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:16:41,626 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:16:41,728 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:16:41,743 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:16:41,762 INFO L158 Benchmark]: Toolchain (without parser) took 677.60ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 65.7MB in the beginning and 80.5MB in the end (delta: -14.8MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-11-23 17:16:41,763 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 94.4MB. Free memory is still 47.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:16:41,764 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.54ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 65.4MB in the beginning and 91.6MB in the end (delta: -26.2MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-11-23 17:16:41,765 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.84ms. Allocated memory is still 115.3MB. Free memory was 91.6MB in the beginning and 90.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:16:41,766 INFO L158 Benchmark]: Boogie Preprocessor took 39.31ms. Allocated memory is still 115.3MB. Free memory was 90.4MB in the beginning and 89.5MB in the end (delta: 923.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:16:41,767 INFO L158 Benchmark]: RCFGBuilder took 310.73ms. Allocated memory is still 115.3MB. Free memory was 89.5MB in the beginning and 80.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:16:41,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 94.4MB. Free memory is still 47.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.54ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 65.4MB in the beginning and 91.6MB in the end (delta: -26.2MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.84ms. Allocated memory is still 115.3MB. Free memory was 91.6MB in the beginning and 90.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.31ms. Allocated memory is still 115.3MB. Free memory was 90.4MB in the beginning and 89.5MB in the end (delta: 923.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 310.73ms. Allocated memory is still 115.3MB. Free memory was 89.5MB in the beginning and 80.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:16:41,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:16:44,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:16:44,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:16:44,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:16:44,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:16:44,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:16:44,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:16:44,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:16:44,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:16:44,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:16:44,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:16:44,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:16:44,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:16:44,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:16:44,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:16:44,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:16:44,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:16:44,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:16:44,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:16:44,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:16:44,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:16:44,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:16:44,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:16:44,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:16:44,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:16:44,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:16:44,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:16:44,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:16:44,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:16:44,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:16:44,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:16:44,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:16:44,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:16:44,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:16:44,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:16:44,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:16:44,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:16:44,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:16:44,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:16:44,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:16:44,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:16:44,554 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:16:44,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:16:44,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:16:44,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:16:44,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:16:44,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:16:44,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:16:44,600 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:16:44,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:16:44,600 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:16:44,600 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:16:44,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:16:44,602 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:16:44,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:16:44,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:16:44,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:16:44,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:16:44,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:16:44,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:16:44,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:16:44,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:16:44,605 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:16:44,606 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:16:44,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:16:44,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:16:44,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:16:44,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:16:44,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:16:44,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:16:44,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:16:44,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:44,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:16:44,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:16:44,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:16:44,608 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:16:44,608 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:44,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:16:44,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:16:44,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:16:44,609 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_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2021-11-23 17:16:44,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:16:45,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:16:45,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:16:45,014 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:16:45,014 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:16:45,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-11-23 17:16:45,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/982c6a392/a13dfeb937704476ade34c097596bd6f/FLAGae9977aa6 [2021-11-23 17:16:45,756 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:16:45,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-11-23 17:16:45,764 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/982c6a392/a13dfeb937704476ade34c097596bd6f/FLAGae9977aa6 [2021-11-23 17:16:45,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/data/982c6a392/a13dfeb937704476ade34c097596bd6f [2021-11-23 17:16:45,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:16:45,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:16:45,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:45,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:16:45,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:16:45,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:45" (1/1) ... [2021-11-23 17:16:45,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad32b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:45, skipping insertion in model container [2021-11-23 17:16:45,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:45" (1/1) ... [2021-11-23 17:16:45,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:16:45,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:16:45,995 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_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2021-11-23 17:16:46,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:46,025 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:16:46,042 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_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2021-11-23 17:16:46,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:46,073 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:16:46,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46 WrapperNode [2021-11-23 17:16:46,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:46,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:46,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:16:46,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:16:46,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,138 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-11-23 17:16:46,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:46,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:16:46,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:16:46,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:16:46,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:16:46,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:16:46,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:16:46,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:16:46,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (1/1) ... [2021-11-23 17:16:46,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:46,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:46,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:16:46,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:16:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:16:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:16:46,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:16:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:16:46,363 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:16:46,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:16:46,544 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:16:46,551 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:16:46,551 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:16:46,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:16:46 BoogieIcfgContainer [2021-11-23 17:16:46,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:16:46,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:16:46,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:16:46,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:16:46,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:16:45" (1/3) ... [2021-11-23 17:16:46,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae613f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:16:46, skipping insertion in model container [2021-11-23 17:16:46,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:46" (2/3) ... [2021-11-23 17:16:46,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae613f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:16:46, skipping insertion in model container [2021-11-23 17:16:46,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:16:46" (3/3) ... [2021-11-23 17:16:46,567 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2021-11-23 17:16:46,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:16:46,573 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:16:46,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:16:46,654 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=FINITE_AUTOMATA, 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 [2021-11-23 17:16:46,655 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:16:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:16:46,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:46,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:16:46,699 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:46,707 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-23 17:16:46,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:46,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059322169] [2021-11-23 17:16:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:46,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:46,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:46,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:16:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:16:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:46,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:46,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059322169] [2021-11-23 17:16:46,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059322169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:46,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:46,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:16:46,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319424285] [2021-11-23 17:16:46,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:46,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:16:46,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:46,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:16:46,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:16:46,999 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:47,033 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-23 17:16:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:16:47,035 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 17:16:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:47,044 INFO L225 Difference]: With dead ends: 21 [2021-11-23 17:16:47,044 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 17:16:47,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:16:47,058 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:47,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:16:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 17:16:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 17:16:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-23 17:16:47,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-23 17:16:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:47,103 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-23 17:16:47,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-23 17:16:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:16:47,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:47,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:16:47,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:47,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:47,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-23 17:16:47,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:47,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924789605] [2021-11-23 17:16:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:47,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:47,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:47,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:16:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:47,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:47,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924789605] [2021-11-23 17:16:47,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924789605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:47,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:47,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:16:47,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820632901] [2021-11-23 17:16:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:47,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:47,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:47,469 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:47,513 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-11-23 17:16:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 17:16:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:47,515 INFO L225 Difference]: With dead ends: 19 [2021-11-23 17:16:47,515 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:16:47,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:47,517 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 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 [2021-11-23 17:16:47,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:16:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:16:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-23 17:16:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-23 17:16:47,528 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-23 17:16:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:47,529 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-23 17:16:47,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-23 17:16:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:16:47,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:47,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:47,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:47,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:47,742 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2021-11-23 17:16:47,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:47,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077444186] [2021-11-23 17:16:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:47,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:47,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:47,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:16:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:47,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:47,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:47,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077444186] [2021-11-23 17:16:47,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077444186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:47,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [328392997] [2021-11-23 17:16:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:47,907 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:47,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:47,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:47,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:16:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:48,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:48,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [328392997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:48,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:16:48,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2021-11-23 17:16:48,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797668203] [2021-11-23 17:16:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:48,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:48,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:48,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:16:48,079 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:48,146 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-23 17:16:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:16:48,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 17:16:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:48,156 INFO L225 Difference]: With dead ends: 20 [2021-11-23 17:16:48,156 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 17:16:48,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:16:48,158 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:48,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:16:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 17:16:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-11-23 17:16:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-23 17:16:48,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-23 17:16:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:48,164 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-23 17:16:48,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-23 17:16:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:16:48,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:48,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:48,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:48,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 17:16:48,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:48,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1664855024, now seen corresponding path program 1 times [2021-11-23 17:16:48,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:48,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220294627] [2021-11-23 17:16:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:48,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:48,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:48,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:48,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:16:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:48,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:48,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:48,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:48,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220294627] [2021-11-23 17:16:48,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220294627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:48,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [315898212] [2021-11-23 17:16:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:48,730 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:48,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:48,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:16:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:48,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:48,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [315898212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92653372] [2021-11-23 17:16:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:48,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:48,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:48,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:48,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:16:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:16:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:49,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:49,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92653372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:49,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:49,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 6] total 9 [2021-11-23 17:16:49,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967035965] [2021-11-23 17:16:49,137 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:49,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:16:49,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:16:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:16:49,150 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:49,262 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-11-23 17:16:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:16:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 17:16:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:49,264 INFO L225 Difference]: With dead ends: 31 [2021-11-23 17:16:49,264 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 17:16:49,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:16:49,274 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:49,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 20 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:16:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 17:16:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 17:16:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-23 17:16:49,287 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2021-11-23 17:16:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:49,288 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-23 17:16:49,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-23 17:16:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 17:16:49,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:49,290 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:49,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:49,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:49,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:49,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:49,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2092941831, now seen corresponding path program 2 times [2021-11-23 17:16:49,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:49,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533545662] [2021-11-23 17:16:49,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:49,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:49,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:49,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:49,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:16:49,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:49,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:16:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:50,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533545662] [2021-11-23 17:16:50,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533545662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830998180] [2021-11-23 17:16:50,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:50,289 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:50,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:50,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:50,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:16:50,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:50,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:50,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:16:50,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:50,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:50,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1830998180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:50,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469899975] [2021-11-23 17:16:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:50,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:50,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:50,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:50,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:16:50,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:50,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:16:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:50,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:50,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469899975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:50,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:50,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2021-11-23 17:16:50,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511151254] [2021-11-23 17:16:50,744 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:50,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:16:50,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:16:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:16:50,746 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:51,471 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2021-11-23 17:16:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 17:16:51,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 17:16:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:51,474 INFO L225 Difference]: With dead ends: 182 [2021-11-23 17:16:51,474 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 17:16:51,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1344, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 17:16:51,476 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:51,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 176 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:16:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 17:16:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2021-11-23 17:16:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 111 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 149 transitions. [2021-11-23 17:16:51,517 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 149 transitions. Word has length 21 [2021-11-23 17:16:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:51,518 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 149 transitions. [2021-11-23 17:16:51,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 149 transitions. [2021-11-23 17:16:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:16:51,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:51,520 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:51,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:51,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:51,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:52,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:52,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:52,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1180250981, now seen corresponding path program 3 times [2021-11-23 17:16:52,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:52,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022362225] [2021-11-23 17:16:52,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:52,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:52,141 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:52,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:16:52,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 17:16:52,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:52,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:16:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:16:52,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:16:52,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:52,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022362225] [2021-11-23 17:16:52,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022362225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:52,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441826200] [2021-11-23 17:16:52,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:52,444 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:52,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:52,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:52,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:16:52,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 17:16:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:52,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:16:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:16:52,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:16:52,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [441826200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:52,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261203344] [2021-11-23 17:16:52,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:52,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:52,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:52,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:16:52,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 17:16:52,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:16:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:16:52,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:16:53,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261203344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:53,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:53,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7, 7, 7, 7] total 16 [2021-11-23 17:16:53,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184050034] [2021-11-23 17:16:53,027 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:53,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:16:53,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:16:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:16:53,030 INFO L87 Difference]: Start difference. First operand 112 states and 149 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:53,407 INFO L93 Difference]: Finished difference Result 365 states and 516 transitions. [2021-11-23 17:16:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:16:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 17:16:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:53,414 INFO L225 Difference]: With dead ends: 365 [2021-11-23 17:16:53,414 INFO L226 Difference]: Without dead ends: 266 [2021-11-23 17:16:53,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=371, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:16:53,417 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:53,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:16:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-23 17:16:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 40. [2021-11-23 17:16:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-23 17:16:53,440 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2021-11-23 17:16:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:53,441 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-23 17:16:53,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-23 17:16:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 17:16:53,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:53,443 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:53,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:53,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:53,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:54,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:54,063 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 881996313, now seen corresponding path program 4 times [2021-11-23 17:16:54,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5505633] [2021-11-23 17:16:54,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:54,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:54,066 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:54,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:16:54,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:54,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:16:54,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 17:16:54,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 17:16:54,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:54,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5505633] [2021-11-23 17:16:54,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5505633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:54,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698700561] [2021-11-23 17:16:54,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:54,328 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:54,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:54,329 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:54,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:16:54,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:54,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:16:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 17:16:54,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 17:16:54,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1698700561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009543212] [2021-11-23 17:16:54,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:54,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:54,585 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:54,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:16:54,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:54,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:16:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:16:54,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:16:55,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009543212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:55,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:55,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 11, 11] total 30 [2021-11-23 17:16:55,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394489469] [2021-11-23 17:16:55,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:55,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:16:55,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:16:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:16:55,206 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:57,307 INFO L93 Difference]: Finished difference Result 332 states and 397 transitions. [2021-11-23 17:16:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 17:16:57,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 17:16:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:57,309 INFO L225 Difference]: With dead ends: 332 [2021-11-23 17:16:57,310 INFO L226 Difference]: Without dead ends: 303 [2021-11-23 17:16:57,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1123, Invalid=5357, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 17:16:57,314 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:57,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:16:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-23 17:16:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 250. [2021-11-23 17:16:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1847389558232932) internal successors, (295), 249 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 295 transitions. [2021-11-23 17:16:57,369 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 295 transitions. Word has length 39 [2021-11-23 17:16:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:57,369 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 295 transitions. [2021-11-23 17:16:57,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 295 transitions. [2021-11-23 17:16:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 17:16:57,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:57,373 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:57,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:57,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:57,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-23 17:16:57,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:57,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1503030606, now seen corresponding path program 5 times [2021-11-23 17:16:57,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:57,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384757979] [2021-11-23 17:16:57,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:16:57,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:57,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:57,987 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:57,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:16:58,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 17:16:58,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:58,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:16:58,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 245 proven. 155 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 17:16:58,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 245 proven. 155 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 17:16:58,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384757979] [2021-11-23 17:16:58,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384757979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [302433131] [2021-11-23 17:16:58,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:16:58,949 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:58,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:58,953 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:58,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 17:16:59,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 17:16:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:16:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 245 proven. 155 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 17:16:59,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 245 proven. 155 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 17:16:59,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [302433131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257017721] [2021-11-23 17:16:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:16:59,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:59,608 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 17:16:59,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 17:16:59,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:59,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:16:59,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 454 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 17:17:00,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 454 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 17:17:00,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257017721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:00,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:17:00,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13, 14, 14, 14] total 49 [2021-11-23 17:17:00,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713063847] [2021-11-23 17:17:00,914 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:17:00,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 17:17:00,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 17:17:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 17:17:00,917 INFO L87 Difference]: Start difference. First operand 250 states and 295 transitions. Second operand has 49 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 49 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:06,582 INFO L93 Difference]: Finished difference Result 340 states and 411 transitions. [2021-11-23 17:17:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-23 17:17:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 49 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 17:17:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:06,584 INFO L225 Difference]: With dead ends: 340 [2021-11-23 17:17:06,584 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 17:17:06,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2294, Invalid=8212, Unknown=0, NotChecked=0, Total=10506 [2021-11-23 17:17:06,593 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:06,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 83 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 17:17:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 17:17:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-11-23 17:17:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.064516129032258) internal successors, (99), 93 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-11-23 17:17:06,611 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 60 [2021-11-23 17:17:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:06,611 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-11-23 17:17:06,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 49 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-11-23 17:17:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 17:17:06,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:06,615 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 22, 7, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:06,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:06,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-23 17:17:07,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:07,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:07,227 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1149476935, now seen corresponding path program 6 times [2021-11-23 17:17:07,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:07,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265615878] [2021-11-23 17:17:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:17:07,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:07,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:07,230 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:07,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:17:07,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-23 17:17:07,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:07,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:17:07,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-23 17:17:07,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-23 17:17:08,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265615878] [2021-11-23 17:17:08,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265615878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [451406758] [2021-11-23 17:17:08,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:17:08,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:08,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:08,272 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:08,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 17:17:08,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-23 17:17:08,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:08,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:17:08,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-23 17:17:08,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-23 17:17:09,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [451406758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:09,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514159042] [2021-11-23 17:17:09,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:17:09,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:09,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:09,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:09,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 17:17:09,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-23 17:17:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:09,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:17:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-23 17:17:09,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-23 17:17:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514159042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:09,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:17:09,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 30 [2021-11-23 17:17:09,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33315379] [2021-11-23 17:17:09,574 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:17:09,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:17:09,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:17:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:17:09,577 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:11,095 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2021-11-23 17:17:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 17:17:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 17:17:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:11,103 INFO L225 Difference]: With dead ends: 197 [2021-11-23 17:17:11,103 INFO L226 Difference]: Without dead ends: 143 [2021-11-23 17:17:11,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=948, Invalid=1704, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 17:17:11,111 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 189 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:11,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 22 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:17:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-23 17:17:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 124. [2021-11-23 17:17:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.089430894308943) internal successors, (134), 123 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-11-23 17:17:11,133 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 93 [2021-11-23 17:17:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:11,134 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-11-23 17:17:11,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-11-23 17:17:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 17:17:11,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:11,137 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 22, 17, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:11,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:11,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-23 17:17:11,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-23 17:17:11,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:11,740 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1666531687, now seen corresponding path program 7 times [2021-11-23 17:17:11,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:11,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776002868] [2021-11-23 17:17:11,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:17:11,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:11,745 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:11,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:17:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:17:11,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 1133 proven. 737 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 17:17:12,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 1133 proven. 737 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 17:17:13,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:13,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776002868] [2021-11-23 17:17:13,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776002868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:13,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701993913] [2021-11-23 17:17:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:17:13,423 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:13,426 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:13,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 17:17:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:17:13,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 1133 proven. 737 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 17:17:13,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 1133 proven. 737 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 17:17:14,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701993913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547855921] [2021-11-23 17:17:14,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:17:14,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:14,198 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:14,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 17:17:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 17:17:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2212 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:17:15,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2212 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:17:17,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547855921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:17,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:17:17,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 26, 26] total 96 [2021-11-23 17:17:17,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70472867] [2021-11-23 17:17:17,654 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:17:17,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-23 17:17:17,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-23 17:17:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=7890, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 17:17:17,661 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 96 states, 96 states have (on average 3.3541666666666665) internal successors, (322), 96 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:34,714 INFO L93 Difference]: Finished difference Result 307 states and 351 transitions. [2021-11-23 17:17:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-23 17:17:34,715 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.3541666666666665) internal successors, (322), 96 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-23 17:17:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:34,717 INFO L225 Difference]: With dead ends: 307 [2021-11-23 17:17:34,717 INFO L226 Difference]: Without dead ends: 223 [2021-11-23 17:17:34,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5375 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=6728, Invalid=28054, Unknown=0, NotChecked=0, Total=34782 [2021-11-23 17:17:34,727 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:34,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2787 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 17:17:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-23 17:17:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2021-11-23 17:17:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0564102564102564) internal successors, (206), 195 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 206 transitions. [2021-11-23 17:17:34,763 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 206 transitions. Word has length 123 [2021-11-23 17:17:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:34,764 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 206 transitions. [2021-11-23 17:17:34,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.3541666666666665) internal successors, (322), 96 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 206 transitions. [2021-11-23 17:17:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 17:17:34,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:34,768 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 46, 17, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:34,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:35,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-23 17:17:35,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:35,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:35,396 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash 569472537, now seen corresponding path program 8 times [2021-11-23 17:17:35,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:35,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692463786] [2021-11-23 17:17:35,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:17:35,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:35,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:35,400 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:35,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:17:35,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:17:35,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:17:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 2333 proven. 3197 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 17:17:36,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 2333 proven. 3197 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 17:17:41,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692463786] [2021-11-23 17:17:41,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692463786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [414378582] [2021-11-23 17:17:41,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:17:41,153 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:41,154 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 17:17:41,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:17:41,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:41,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 17:17:41,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5872 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:17:46,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5872 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:17:51,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [414378582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699101490] [2021-11-23 17:17:51,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:17:51,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:51,994 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:51,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 17:17:52,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:17:52,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 17:17:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5872 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:17:52,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5872 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:17:52,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699101490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:52,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:17:52,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50, 50, 50, 50] total 192 [2021-11-23 17:17:52,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899988013] [2021-11-23 17:17:52,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:17:52,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-23 17:17:52,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-23 17:17:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4782, Invalid=31890, Unknown=0, NotChecked=0, Total=36672 [2021-11-23 17:17:52,929 INFO L87 Difference]: Start difference. First operand 196 states and 206 transitions. Second operand has 192 states, 192 states have (on average 3.1770833333333335) internal successors, (610), 192 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:39,637 INFO L93 Difference]: Finished difference Result 451 states and 519 transitions. [2021-11-23 17:19:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-23 17:19:39,640 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 3.1770833333333335) internal successors, (610), 192 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-23 17:19:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:39,645 INFO L225 Difference]: With dead ends: 451 [2021-11-23 17:19:39,645 INFO L226 Difference]: Without dead ends: 367 [2021-11-23 17:19:39,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22103 ImplicationChecksByTransitivity, 116.9s TimeCoverageRelationStatistics Valid=28952, Invalid=114310, Unknown=0, NotChecked=0, Total=143262 [2021-11-23 17:19:39,662 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 12781 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 13108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 12781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:39,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 397 Invalid, 13108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 12781 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 17:19:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-23 17:19:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 340. [2021-11-23 17:19:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.0324483775811208) internal successors, (350), 339 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 350 transitions. [2021-11-23 17:19:39,725 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 350 transitions. Word has length 195 [2021-11-23 17:19:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:39,725 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 350 transitions. [2021-11-23 17:19:39,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 3.1770833333333335) internal successors, (610), 192 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 350 transitions. [2021-11-23 17:19:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-23 17:19:39,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:39,734 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 94, 17, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:39,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:39,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-23 17:19:40,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-23 17:19:40,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:40,336 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1036229351, now seen corresponding path program 9 times [2021-11-23 17:19:40,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:40,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727954368] [2021-11-23 17:19:40,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:19:40,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:40,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:40,339 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:40,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:19:40,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-23 17:19:40,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:19:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:19:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18426 backedges. 4964 proven. 442 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2021-11-23 17:19:41,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18426 backedges. 4964 proven. 442 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2021-11-23 17:19:42,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:42,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727954368] [2021-11-23 17:19:42,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727954368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:19:42,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834516705] [2021-11-23 17:19:42,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:19:42,917 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:19:42,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:19:42,935 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:19:42,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 17:19:43,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-23 17:19:43,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:19:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:19:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18426 backedges. 4964 proven. 442 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2021-11-23 17:19:43,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18426 backedges. 4964 proven. 442 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2021-11-23 17:19:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [834516705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:19:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114515742] [2021-11-23 17:19:44,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:19:44,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:19:44,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:19:44,413 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:19:44,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 17:19:44,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-23 17:19:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:19:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:19:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18426 backedges. 4964 proven. 442 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2021-11-23 17:19:45,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18426 backedges. 4964 proven. 442 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2021-11-23 17:19:45,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114515742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:19:45,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:19:45,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22, 22] total 42 [2021-11-23 17:19:45,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857344500] [2021-11-23 17:19:45,892 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:19:45,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 17:19:45,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:45,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 17:19:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1239, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 17:19:45,896 INFO L87 Difference]: Start difference. First operand 340 states and 350 transitions. Second operand has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:50,299 INFO L93 Difference]: Finished difference Result 485 states and 545 transitions. [2021-11-23 17:19:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 17:19:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-11-23 17:19:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:50,302 INFO L225 Difference]: With dead ends: 485 [2021-11-23 17:19:50,303 INFO L226 Difference]: Without dead ends: 401 [2021-11-23 17:19:50,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2066 GetRequests, 2006 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1323, Invalid=2459, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 17:19:50,304 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 475 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:50,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 71 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 17:19:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-23 17:19:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 400. [2021-11-23 17:19:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.0526315789473684) internal successors, (420), 399 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 420 transitions. [2021-11-23 17:19:50,366 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 420 transitions. Word has length 339 [2021-11-23 17:19:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:50,367 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 420 transitions. [2021-11-23 17:19:50,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 420 transitions. [2021-11-23 17:19:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-23 17:19:50,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:50,377 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 94, 37, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:50,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:50,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-23 17:19:50,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:50,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:19:50,990 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash 495880921, now seen corresponding path program 10 times [2021-11-23 17:19:50,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:50,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286090414] [2021-11-23 17:19:50,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:19:50,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:50,993 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:51,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:19:51,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:19:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:19:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 17:19:51,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25676 backedges. 10413 proven. 13301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-23 17:19:56,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25676 backedges. 10413 proven. 13301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-23 17:20:10,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286090414] [2021-11-23 17:20:10,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286090414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [676804845] [2021-11-23 17:20:10,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:20:10,698 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:20:10,699 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:20:10,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 17:20:11,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:20:11,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:20:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 17:20:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25676 backedges. 10413 proven. 13301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-23 17:20:12,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25676 backedges. 10413 proven. 13301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-23 17:20:13,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [676804845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:13,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756419688] [2021-11-23 17:20:13,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:20:13,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:20:13,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:20:13,102 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:20:13,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43c33f00-e8ea-4e4c-81a8-e9e72f6ad1e1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 17:20:13,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:20:13,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:20:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-23 17:20:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25676 backedges. 0 proven. 25566 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:20:30,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25676 backedges. 0 proven. 25566 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:20:56,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756419688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:56,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:20:56,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97, 97, 98, 98] total 384 [2021-11-23 17:20:56,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851125553] [2021-11-23 17:20:56,115 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:20:56,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-23 17:20:56,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-23 17:20:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18778, Invalid=128294, Unknown=0, NotChecked=0, Total=147072 [2021-11-23 17:20:56,134 INFO L87 Difference]: Start difference. First operand 400 states and 420 transitions. Second operand has 384 states, 384 states have (on average 3.1927083333333335) internal successors, (1226), 384 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)