./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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 065db717d2cdf97087f1b115414109818504267e957198e710d38901ef11a98a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:38,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:38,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:38,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:38,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:38,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:38,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:38,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:38,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:38,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:38,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:38,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:38,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:38,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:38,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:38,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:38,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:38,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:38,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:38,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:38,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:38,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:38,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:38,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:38,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:38,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:38,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:38,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:38,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:38,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:38,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:38,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:38,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:38,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:38,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:38,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:38,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:38,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:38,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:38,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:38,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:38,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:24:38,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:38,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:38,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:38,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:38,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:38,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:38,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:38,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:38,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:38,823 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:24:38,824 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:38,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:38,825 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:24:38,825 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:24:38,825 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:38,826 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:24:38,826 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:24:38,826 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:24:38,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:38,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:38,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:24:38,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:38,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:38,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:38,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:38,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:38,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:38,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:38,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:38,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:38,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:38,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:38,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:38,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:38,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:38,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:38,833 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:24:38,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:24:38,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:38,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:38,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:38,834 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 065db717d2cdf97087f1b115414109818504267e957198e710d38901ef11a98a [2021-11-23 17:24:39,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:39,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:39,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:39,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:39,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:39,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c [2021-11-23 17:24:39,299 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/aedf7e2d2/f7ae1040b26846d2ae7622092ae889d5/FLAGba58fee00 [2021-11-23 17:24:40,447 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:40,448 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c [2021-11-23 17:24:40,492 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/aedf7e2d2/f7ae1040b26846d2ae7622092ae889d5/FLAGba58fee00 [2021-11-23 17:24:40,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/aedf7e2d2/f7ae1040b26846d2ae7622092ae889d5 [2021-11-23 17:24:40,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:40,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:40,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:40,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:40,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:40,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:40" (1/1) ... [2021-11-23 17:24:40,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7935ecf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:40, skipping insertion in model container [2021-11-23 17:24:40,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:40" (1/1) ... [2021-11-23 17:24:40,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:41,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:41,605 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[11640,11653] [2021-11-23 17:24:41,665 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[15147,15160] [2021-11-23 17:24:42,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:42,805 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:42,878 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[11640,11653] [2021-11-23 17:24:42,889 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[15147,15160] [2021-11-23 17:24:43,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:43,627 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:43,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43 WrapperNode [2021-11-23 17:24:43,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:43,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:43,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:43,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:43,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:43,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:44,323 INFO L137 Inliner]: procedures = 36, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5090 [2021-11-23 17:24:44,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:44,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:44,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:44,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:44,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:44,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:44,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:44,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:44,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:44,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:44,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:45,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:24:45,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:24:45,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:24:45,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:24:45,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:43" (1/1) ... [2021-11-23 17:24:45,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:45,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:24:45,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:24:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:24:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:24:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:24:45,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:24:45,317 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:24:45,361 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:24:50,956 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:24:51,019 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 17:24:51,031 INFO L158 Benchmark]: Toolchain (without parser) took 10191.50ms. Allocated memory was 111.1MB in the beginning and 425.7MB in the end (delta: 314.6MB). Free memory was 83.3MB in the beginning and 204.7MB in the end (delta: -121.3MB). Peak memory consumption was 230.5MB. Max. memory is 16.1GB. [2021-11-23 17:24:51,032 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 111.1MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:24:51,035 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2777.01ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 82.9MB in the beginning and 89.4MB in the end (delta: -6.5MB). Peak memory consumption was 70.2MB. Max. memory is 16.1GB. [2021-11-23 17:24:51,036 INFO L158 Benchmark]: Boogie Procedure Inliner took 694.44ms. Allocated memory was 144.7MB in the beginning and 218.1MB in the end (delta: 73.4MB). Free memory was 89.4MB in the beginning and 120.1MB in the end (delta: -30.7MB). Peak memory consumption was 78.3MB. Max. memory is 16.1GB. [2021-11-23 17:24:51,038 INFO L158 Benchmark]: Boogie Preprocessor took 689.66ms. Allocated memory is still 218.1MB. Free memory was 120.1MB in the beginning and 85.7MB in the end (delta: 34.4MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-23 17:24:51,040 INFO L158 Benchmark]: RCFGBuilder took 6012.11ms. Allocated memory was 218.1MB in the beginning and 425.7MB in the end (delta: 207.6MB). Free memory was 85.7MB in the beginning and 204.7MB in the end (delta: -119.0MB). Peak memory consumption was 128.1MB. Max. memory is 16.1GB. [2021-11-23 17:24:51,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 111.1MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2777.01ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 82.9MB in the beginning and 89.4MB in the end (delta: -6.5MB). Peak memory consumption was 70.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 694.44ms. Allocated memory was 144.7MB in the beginning and 218.1MB in the end (delta: 73.4MB). Free memory was 89.4MB in the beginning and 120.1MB in the end (delta: -30.7MB). Peak memory consumption was 78.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 689.66ms. Allocated memory is still 218.1MB. Free memory was 120.1MB in the beginning and 85.7MB in the end (delta: 34.4MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * RCFGBuilder took 6012.11ms. Allocated memory was 218.1MB in the beginning and 425.7MB in the end (delta: 207.6MB). Free memory was 85.7MB in the beginning and 204.7MB in the end (delta: -119.0MB). Peak memory consumption was 128.1MB. 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 17:24:51,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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 065db717d2cdf97087f1b115414109818504267e957198e710d38901ef11a98a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:53,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:53,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:53,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:53,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:53,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:53,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:54,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:54,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:54,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:54,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:54,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:54,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:54,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:54,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:54,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:54,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:54,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:54,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:54,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:54,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:54,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:54,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:54,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:54,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:54,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:54,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:54,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:54,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:54,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:54,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:54,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:54,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:54,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:54,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:54,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:54,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:54,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:54,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:54,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:54,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:54,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:24:54,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:54,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:54,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:54,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:54,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:54,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:54,138 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:54,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:54,139 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:54,139 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:54,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:54,141 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:54,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:54,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:54,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:54,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:54,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:54,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:54,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:54,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:24:54,145 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:24:54,145 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:24:54,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:54,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:54,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:54,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:54,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:54,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:24:54,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:54,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:54,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:54,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:54,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:54,149 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:24:54,150 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:54,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:54,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:54,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:54,151 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 065db717d2cdf97087f1b115414109818504267e957198e710d38901ef11a98a [2021-11-23 17:24:54,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:54,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:54,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:54,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:54,696 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:54,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c [2021-11-23 17:24:54,774 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/ca3a2d003/e6ed16f8548a45a6b1bda6e70a58b982/FLAG1189b829f [2021-11-23 17:24:55,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:55,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c [2021-11-23 17:24:55,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/ca3a2d003/e6ed16f8548a45a6b1bda6e70a58b982/FLAG1189b829f [2021-11-23 17:24:56,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/data/ca3a2d003/e6ed16f8548a45a6b1bda6e70a58b982 [2021-11-23 17:24:56,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:56,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:56,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:56,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:56,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:56,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:56" (1/1) ... [2021-11-23 17:24:56,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b20718e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:56, skipping insertion in model container [2021-11-23 17:24:56,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:56" (1/1) ... [2021-11-23 17:24:56,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:56,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:57,022 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[11640,11653] [2021-11-23 17:24:57,070 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[15147,15160] [2021-11-23 17:24:58,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:58,438 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:58,476 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[11640,11653] [2021-11-23 17:24:58,486 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_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c[15147,15160] [2021-11-23 17:24:59,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:59,267 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:59,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59 WrapperNode [2021-11-23 17:24:59,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:59,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:59,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:59,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:59,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,684 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5065 [2021-11-23 17:24:59,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:59,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:59,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:59,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:59,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:24:59,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:25:00,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:25:00,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:25:00,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:25:00,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (1/1) ... [2021-11-23 17:25:00,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:00,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:00,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:25:00,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:25:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:25:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:25:00,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:25:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:25:00,430 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:25:00,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:25:33,297 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:25:33,326 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:25:33,327 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:25:33,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:33 BoogieIcfgContainer [2021-11-23 17:25:33,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:25:33,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:25:33,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:25:33,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:25:33,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:24:56" (1/3) ... [2021-11-23 17:25:33,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a9f0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:33, skipping insertion in model container [2021-11-23 17:25:33,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:59" (2/3) ... [2021-11-23 17:25:33,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a9f0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:33, skipping insertion in model container [2021-11-23 17:25:33,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:33" (3/3) ... [2021-11-23 17:25:33,342 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label08.c [2021-11-23 17:25:33,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:25:33,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 17:25:33,421 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:25:33,430 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 17:25:33,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 17:25:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 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 17:25:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:25:33,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:33,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:33,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:33,497 INFO L85 PathProgramCache]: Analyzing trace with hash -416780307, now seen corresponding path program 1 times [2021-11-23 17:25:33,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:33,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883375095] [2021-11-23 17:25:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:33,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:33,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:33,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:33,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:25:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:33,921 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 17:25:33,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:33,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883375095] [2021-11-23 17:25:33,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883375095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:33,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:33,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:33,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694218994] [2021-11-23 17:25:33,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:33,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:33,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:33,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:34,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:34,010 INFO L87 Difference]: Start difference. First operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 17:26:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:16,990 INFO L93 Difference]: Finished difference Result 2536 states and 4876 transitions. [2021-11-23 17:26:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 30 [2021-11-23 17:26:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:17,028 INFO L225 Difference]: With dead ends: 2536 [2021-11-23 17:26:17,029 INFO L226 Difference]: Without dead ends: 1594 [2021-11-23 17:26:17,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 17:26:17,041 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 948 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:17,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 743 Invalid, 2981 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [724 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 42.7s Time] [2021-11-23 17:26:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-23 17:26:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-11-23 17:26:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.5678391959798994) internal successors, (2496), 1593 states have internal predecessors, (2496), 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 17:26:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2496 transitions. [2021-11-23 17:26:17,219 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2496 transitions. Word has length 30 [2021-11-23 17:26:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:17,220 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2496 transitions. [2021-11-23 17:26:17,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 17:26:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2496 transitions. [2021-11-23 17:26:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 17:26:17,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:17,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:17,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:17,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:17,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2021-11-23 17:26:17,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:17,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241083144] [2021-11-23 17:26:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:17,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:17,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:17,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:17,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:26:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:17,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:17,788 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 17:26:17,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:17,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:17,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241083144] [2021-11-23 17:26:17,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241083144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:17,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:17,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:17,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476453070] [2021-11-23 17:26:17,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:17,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:26:17,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:26:17,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:17,793 INFO L87 Difference]: Start difference. First operand 1594 states and 2496 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:17,957 INFO L93 Difference]: Finished difference Result 1650 states and 2582 transitions. [2021-11-23 17:26:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:26:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 17:26:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:17,975 INFO L225 Difference]: With dead ends: 1650 [2021-11-23 17:26:17,975 INFO L226 Difference]: Without dead ends: 1594 [2021-11-23 17:26:17,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:17,984 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 3 mSDsluCounter, 4727 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6314 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:17,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6314 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:26:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-23 17:26:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-11-23 17:26:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.5483668341708543) internal successors, (2465), 1593 states have internal predecessors, (2465), 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 17:26:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2465 transitions. [2021-11-23 17:26:18,061 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2465 transitions. Word has length 34 [2021-11-23 17:26:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:18,062 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2465 transitions. [2021-11-23 17:26:18,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2465 transitions. [2021-11-23 17:26:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:18,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:18,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:18,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:18,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:18,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2021-11-23 17:26:18,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839520919] [2021-11-23 17:26:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:18,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:18,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:18,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:26:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:18,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:18,674 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 17:26:18,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:18,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839520919] [2021-11-23 17:26:18,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839520919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:18,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:18,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:18,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585452478] [2021-11-23 17:26:18,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:18,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:18,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:18,679 INFO L87 Difference]: Start difference. First operand 1594 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:18,742 INFO L93 Difference]: Finished difference Result 1692 states and 2619 transitions. [2021-11-23 17:26:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:18,756 INFO L225 Difference]: With dead ends: 1692 [2021-11-23 17:26:18,756 INFO L226 Difference]: Without dead ends: 1640 [2021-11-23 17:26:18,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:26:18,759 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 1511 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:18,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1706 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-23 17:26:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2021-11-23 17:26:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1636 states have (on average 1.5495110024449879) internal successors, (2535), 1637 states have internal predecessors, (2535), 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 17:26:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2535 transitions. [2021-11-23 17:26:18,818 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2535 transitions. Word has length 64 [2021-11-23 17:26:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:18,819 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2535 transitions. [2021-11-23 17:26:18,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2535 transitions. [2021-11-23 17:26:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:18,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:18,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:18,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:19,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:19,038 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2021-11-23 17:26:19,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:19,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494165671] [2021-11-23 17:26:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:19,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:19,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:19,042 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:19,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:26:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:19,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:19,447 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 17:26:19,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:19,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494165671] [2021-11-23 17:26:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494165671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:19,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:19,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612800587] [2021-11-23 17:26:19,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:19,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:19,451 INFO L87 Difference]: Start difference. First operand 1638 states and 2535 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:19,513 INFO L93 Difference]: Finished difference Result 1818 states and 2819 transitions. [2021-11-23 17:26:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:19,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:19,526 INFO L225 Difference]: With dead ends: 1818 [2021-11-23 17:26:19,527 INFO L226 Difference]: Without dead ends: 1722 [2021-11-23 17:26:19,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:26:19,529 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 1507 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:19,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1705 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-11-23 17:26:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2021-11-23 17:26:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1718 states have (on average 1.550640279394645) internal successors, (2664), 1719 states have internal predecessors, (2664), 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 17:26:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2664 transitions. [2021-11-23 17:26:19,595 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2664 transitions. Word has length 64 [2021-11-23 17:26:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:19,595 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 2664 transitions. [2021-11-23 17:26:19,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2664 transitions. [2021-11-23 17:26:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:19,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:19,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:19,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:19,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:19,811 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:19,812 INFO L85 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2021-11-23 17:26:19,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:19,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525629260] [2021-11-23 17:26:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:19,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:19,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:19,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:26:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:20,265 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 17:26:20,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:20,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525629260] [2021-11-23 17:26:20,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525629260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:20,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:20,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:20,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312303187] [2021-11-23 17:26:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:20,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:20,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:20,269 INFO L87 Difference]: Start difference. First operand 1720 states and 2664 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:20,335 INFO L93 Difference]: Finished difference Result 2052 states and 3186 transitions. [2021-11-23 17:26:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:20,350 INFO L225 Difference]: With dead ends: 2052 [2021-11-23 17:26:20,351 INFO L226 Difference]: Without dead ends: 1874 [2021-11-23 17:26:20,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:26:20,353 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 1503 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:20,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-23 17:26:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2021-11-23 17:26:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1870 states have (on average 1.5508021390374331) internal successors, (2900), 1871 states have internal predecessors, (2900), 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 17:26:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2900 transitions. [2021-11-23 17:26:20,420 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2900 transitions. Word has length 64 [2021-11-23 17:26:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:20,421 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 2900 transitions. [2021-11-23 17:26:20,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2900 transitions. [2021-11-23 17:26:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:20,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:20,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:20,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:20,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:20,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2021-11-23 17:26:20,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:20,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44723455] [2021-11-23 17:26:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:20,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:20,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:20,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:20,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:26:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:26:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:21,859 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 17:26:21,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:21,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:21,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44723455] [2021-11-23 17:26:21,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44723455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:21,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:21,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:21,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112073283] [2021-11-23 17:26:21,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:21,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:26:21,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:26:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:26:21,863 INFO L87 Difference]: Start difference. First operand 1872 states and 2900 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 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 17:26:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:22,111 INFO L93 Difference]: Finished difference Result 2213 states and 3431 transitions. [2021-11-23 17:26:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:26:22,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:22,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:22,126 INFO L225 Difference]: With dead ends: 2213 [2021-11-23 17:26:22,127 INFO L226 Difference]: Without dead ends: 1883 [2021-11-23 17:26:22,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:22,130 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 1468 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 4682 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:22,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 4682 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2021-11-23 17:26:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-11-23 17:26:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1883. [2021-11-23 17:26:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1881 states have (on average 1.5486443381180224) internal successors, (2913), 1882 states have internal predecessors, (2913), 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 17:26:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2913 transitions. [2021-11-23 17:26:22,202 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2913 transitions. Word has length 64 [2021-11-23 17:26:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:22,202 INFO L470 AbstractCegarLoop]: Abstraction has 1883 states and 2913 transitions. [2021-11-23 17:26:22,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 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 17:26:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2913 transitions. [2021-11-23 17:26:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:22,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:22,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:22,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:22,419 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -679959214, now seen corresponding path program 1 times [2021-11-23 17:26:22,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:22,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081278929] [2021-11-23 17:26:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:22,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:22,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:22,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:22,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:26:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:22,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:22,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:22,761 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 17:26:22,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:22,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:22,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081278929] [2021-11-23 17:26:22,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081278929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:22,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:22,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:22,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426584330] [2021-11-23 17:26:22,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:22,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:22,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:22,765 INFO L87 Difference]: Start difference. First operand 1883 states and 2913 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:22,840 INFO L93 Difference]: Finished difference Result 2495 states and 3867 transitions. [2021-11-23 17:26:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:22,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:22,859 INFO L225 Difference]: With dead ends: 2495 [2021-11-23 17:26:22,860 INFO L226 Difference]: Without dead ends: 2165 [2021-11-23 17:26:22,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:26:22,862 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 1499 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:22,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 1703 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-11-23 17:26:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2163. [2021-11-23 17:26:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2161 states have (on average 1.5460434983803795) internal successors, (3341), 2162 states have internal predecessors, (3341), 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 17:26:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3341 transitions. [2021-11-23 17:26:22,945 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3341 transitions. Word has length 64 [2021-11-23 17:26:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:22,945 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 3341 transitions. [2021-11-23 17:26:22,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3341 transitions. [2021-11-23 17:26:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:22,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:22,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:22,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:26:23,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:23,163 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash -84000634, now seen corresponding path program 1 times [2021-11-23 17:26:23,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:23,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486426912] [2021-11-23 17:26:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:23,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:23,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:23,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:26:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:26:23,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:24,266 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 17:26:24,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:24,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486426912] [2021-11-23 17:26:24,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486426912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:24,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:24,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:24,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240509126] [2021-11-23 17:26:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:24,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:26:24,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:26:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:26:24,269 INFO L87 Difference]: Start difference. First operand 2163 states and 3341 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 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 17:26:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:24,438 INFO L93 Difference]: Finished difference Result 2777 states and 4291 transitions. [2021-11-23 17:26:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:26:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:24,454 INFO L225 Difference]: With dead ends: 2777 [2021-11-23 17:26:24,455 INFO L226 Difference]: Without dead ends: 2167 [2021-11-23 17:26:24,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:24,459 INFO L933 BasicCegarLoop]: 1545 mSDtfsCounter, 2912 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2912 SdHoareTripleChecker+Valid, 3144 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:24,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2912 Valid, 3144 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-23 17:26:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-11-23 17:26:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2167. [2021-11-23 17:26:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2165 states have (on average 1.5450346420323327) internal successors, (3345), 2166 states have internal predecessors, (3345), 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 17:26:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 3345 transitions. [2021-11-23 17:26:24,541 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 3345 transitions. Word has length 64 [2021-11-23 17:26:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:24,541 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 3345 transitions. [2021-11-23 17:26:24,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 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 17:26:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 3345 transitions. [2021-11-23 17:26:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:24,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:24,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:24,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 17:26:24,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:24,757 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -342166072, now seen corresponding path program 1 times [2021-11-23 17:26:24,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:24,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659043075] [2021-11-23 17:26:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:24,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:24,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:24,760 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:24,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:26:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:25,068 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 17:26:25,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:25,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:25,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659043075] [2021-11-23 17:26:25,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659043075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:25,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:25,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:25,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254919312] [2021-11-23 17:26:25,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:25,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:25,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:25,071 INFO L87 Difference]: Start difference. First operand 2167 states and 3345 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:25,170 INFO L93 Difference]: Finished difference Result 3291 states and 5075 transitions. [2021-11-23 17:26:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:25,190 INFO L225 Difference]: With dead ends: 3291 [2021-11-23 17:26:25,191 INFO L226 Difference]: Without dead ends: 2681 [2021-11-23 17:26:25,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:26:25,196 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 1495 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:25,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 1702 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-23 17:26:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2679. [2021-11-23 17:26:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2677 states have (on average 1.5364213672020919) internal successors, (4113), 2678 states have internal predecessors, (4113), 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 17:26:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 4113 transitions. [2021-11-23 17:26:25,314 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 4113 transitions. Word has length 64 [2021-11-23 17:26:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:25,315 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 4113 transitions. [2021-11-23 17:26:25,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 17:26:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 4113 transitions. [2021-11-23 17:26:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:26:25,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:25,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:25,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:25,539 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash 875819326, now seen corresponding path program 1 times [2021-11-23 17:26:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:25,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478091469] [2021-11-23 17:26:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:25,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:25,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:25,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:25,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:26:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:27,265 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 17:26:27,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:27,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:27,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478091469] [2021-11-23 17:26:27,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478091469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:27,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:27,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:26:27,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315047918] [2021-11-23 17:26:27,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:27,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:26:27,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:26:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:27,268 INFO L87 Difference]: Start difference. First operand 2679 states and 4113 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 17:26:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:27,882 INFO L93 Difference]: Finished difference Result 9411 states and 14391 transitions. [2021-11-23 17:26:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:26:27,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 64 [2021-11-23 17:26:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:27,963 INFO L225 Difference]: With dead ends: 9411 [2021-11-23 17:26:27,963 INFO L226 Difference]: Without dead ends: 8289 [2021-11-23 17:26:27,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:27,969 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 3362 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:27,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3362 Valid, 2018 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:26:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-11-23 17:26:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 4919. [2021-11-23 17:26:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4917 states have (on average 1.5133211307707952) internal successors, (7441), 4918 states have internal predecessors, (7441), 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 17:26:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 7441 transitions. [2021-11-23 17:26:28,386 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 7441 transitions. Word has length 64 [2021-11-23 17:26:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:28,386 INFO L470 AbstractCegarLoop]: Abstraction has 4919 states and 7441 transitions. [2021-11-23 17:26:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 17:26:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 7441 transitions. [2021-11-23 17:26:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 17:26:28,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:28,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:28,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:28,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:28,604 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1566913394, now seen corresponding path program 1 times [2021-11-23 17:26:28,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:28,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845426956] [2021-11-23 17:26:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:28,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:28,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:28,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:28,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:26:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:28,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:28,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:29,042 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 17:26:29,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:29,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:29,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845426956] [2021-11-23 17:26:29,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845426956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:29,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:29,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:29,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346503685] [2021-11-23 17:26:29,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:29,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:29,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:29,045 INFO L87 Difference]: Start difference. First operand 4919 states and 7441 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 17:26:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:29,374 INFO L93 Difference]: Finished difference Result 9851 states and 14819 transitions. [2021-11-23 17:26:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:29,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-23 17:26:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:29,393 INFO L225 Difference]: With dead ends: 9851 [2021-11-23 17:26:29,394 INFO L226 Difference]: Without dead ends: 6489 [2021-11-23 17:26:29,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 17:26:29,401 INFO L933 BasicCegarLoop]: 1589 mSDtfsCounter, 1487 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:29,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 1666 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-11-23 17:26:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 6487. [2021-11-23 17:26:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6487 states, 6485 states have (on average 1.4952968388589052) internal successors, (9697), 6486 states have internal predecessors, (9697), 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 17:26:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6487 states to 6487 states and 9697 transitions. [2021-11-23 17:26:29,852 INFO L78 Accepts]: Start accepts. Automaton has 6487 states and 9697 transitions. Word has length 66 [2021-11-23 17:26:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:29,852 INFO L470 AbstractCegarLoop]: Abstraction has 6487 states and 9697 transitions. [2021-11-23 17:26:29,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 17:26:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6487 states and 9697 transitions. [2021-11-23 17:26:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 17:26:29,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:29,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:29,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:30,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:30,068 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2021-11-23 17:26:30,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:30,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021785808] [2021-11-23 17:26:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:30,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:30,071 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:30,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:26:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:30,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:30,326 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 17:26:30,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:30,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:30,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021785808] [2021-11-23 17:26:30,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021785808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:30,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:30,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:30,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972519008] [2021-11-23 17:26:30,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:30,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:26:30,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:26:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:30,329 INFO L87 Difference]: Start difference. First operand 6487 states and 9697 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 17:26:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:30,985 INFO L93 Difference]: Finished difference Result 10950 states and 16099 transitions. [2021-11-23 17:26:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:26:30,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2021-11-23 17:26:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:31,017 INFO L225 Difference]: With dead ends: 10950 [2021-11-23 17:26:31,017 INFO L226 Difference]: Without dead ends: 10948 [2021-11-23 17:26:31,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:31,022 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 217 mSDsluCounter, 4667 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 6252 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:31,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 6252 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:26:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10948 states. [2021-11-23 17:26:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10948 to 6823. [2021-11-23 17:26:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6823 states, 6821 states have (on average 1.468552998094121) internal successors, (10017), 6822 states have internal predecessors, (10017), 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 17:26:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6823 states to 6823 states and 10017 transitions. [2021-11-23 17:26:31,542 INFO L78 Accepts]: Start accepts. Automaton has 6823 states and 10017 transitions. Word has length 67 [2021-11-23 17:26:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:31,543 INFO L470 AbstractCegarLoop]: Abstraction has 6823 states and 10017 transitions. [2021-11-23 17:26:31,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 17:26:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6823 states and 10017 transitions. [2021-11-23 17:26:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:26:31,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:31,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:31,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:31,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:31,764 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:31,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2021-11-23 17:26:31,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:31,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891701958] [2021-11-23 17:26:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:31,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:31,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:31,767 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:31,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:26:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:34,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891701958] [2021-11-23 17:26:34,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891701958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071701390] [2021-11-23 17:26:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:34,979 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:34,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:34,985 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:26:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:35,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:36,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:37,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2071701390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:37,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70037587] [2021-11-23 17:26:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:37,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:37,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:37,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:37,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:26:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:37,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:38,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:40,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70037587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:40,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:40,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:26:40,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031752784] [2021-11-23 17:26:40,127 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:26:40,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:26:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:26:40,129 INFO L87 Difference]: Start difference. First operand 6823 states and 10017 transitions. Second operand has 16 states, 16 states have (on average 10.3125) internal successors, (165), 15 states have internal predecessors, (165), 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 17:26:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:40,846 INFO L93 Difference]: Finished difference Result 10491 states and 15368 transitions. [2021-11-23 17:26:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:26:40,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.3125) internal successors, (165), 15 states have internal predecessors, (165), 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 95 [2021-11-23 17:26:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:40,866 INFO L225 Difference]: With dead ends: 10491 [2021-11-23 17:26:40,866 INFO L226 Difference]: Without dead ends: 6841 [2021-11-23 17:26:40,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:26:40,876 INFO L933 BasicCegarLoop]: 1539 mSDtfsCounter, 7311 mSDsluCounter, 10778 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7311 SdHoareTripleChecker+Valid, 12317 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:40,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7311 Valid, 12317 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2021-11-23 17:26:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-11-23 17:26:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 6840. [2021-11-23 17:26:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6838 states have (on average 1.467680608365019) internal successors, (10036), 6839 states have internal predecessors, (10036), 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 17:26:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 10036 transitions. [2021-11-23 17:26:41,304 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 10036 transitions. Word has length 95 [2021-11-23 17:26:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:41,304 INFO L470 AbstractCegarLoop]: Abstraction has 6840 states and 10036 transitions. [2021-11-23 17:26:41,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.3125) internal successors, (165), 15 states have internal predecessors, (165), 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 17:26:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 10036 transitions. [2021-11-23 17:26:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:26:41,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:41,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:41,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:41,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:41,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:41,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:41,923 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2021-11-23 17:26:41,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:41,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788999598] [2021-11-23 17:26:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:41,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:41,927 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:41,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:26:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:42,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:44,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:44,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:44,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788999598] [2021-11-23 17:26:44,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788999598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:44,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098608551] [2021-11-23 17:26:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:44,946 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:44,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:44,948 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:44,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:26:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:45,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:47,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:47,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098608551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850551441] [2021-11-23 17:26:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:47,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:47,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:47,457 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:47,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:26:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:47,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:49,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:49,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850551441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:49,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:49,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:26:49,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055015984] [2021-11-23 17:26:49,793 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:49,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:26:49,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:26:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:26:49,796 INFO L87 Difference]: Start difference. First operand 6840 states and 10036 transitions. Second operand has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 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 17:26:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:50,465 INFO L93 Difference]: Finished difference Result 10647 states and 15531 transitions. [2021-11-23 17:26:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:26:50,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 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 95 [2021-11-23 17:26:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:50,483 INFO L225 Difference]: With dead ends: 10647 [2021-11-23 17:26:50,483 INFO L226 Difference]: Without dead ends: 6997 [2021-11-23 17:26:50,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:26:50,492 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 8815 mSDsluCounter, 9252 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8815 SdHoareTripleChecker+Valid, 10790 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:50,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8815 Valid, 10790 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2021-11-23 17:26:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6997 states. [2021-11-23 17:26:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6997 to 6850. [2021-11-23 17:26:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6850 states, 6848 states have (on average 1.4675817757009346) internal successors, (10050), 6849 states have internal predecessors, (10050), 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 17:26:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6850 states to 6850 states and 10050 transitions. [2021-11-23 17:26:50,906 INFO L78 Accepts]: Start accepts. Automaton has 6850 states and 10050 transitions. Word has length 95 [2021-11-23 17:26:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:50,907 INFO L470 AbstractCegarLoop]: Abstraction has 6850 states and 10050 transitions. [2021-11-23 17:26:50,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 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 17:26:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6850 states and 10050 transitions. [2021-11-23 17:26:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:26:50,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:50,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:50,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-23 17:26:51,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:51,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:51,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:51,540 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2003946273, now seen corresponding path program 1 times [2021-11-23 17:26:51,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:51,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489452994] [2021-11-23 17:26:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:51,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:51,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:51,542 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:51,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:26:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:51,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:51,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:51,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:51,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:51,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489452994] [2021-11-23 17:26:51,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489452994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:51,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:51,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:51,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732238615] [2021-11-23 17:26:51,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:51,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:51,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:51,875 INFO L87 Difference]: Start difference. First operand 6850 states and 10050 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:26:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:52,144 INFO L93 Difference]: Finished difference Result 12118 states and 17668 transitions. [2021-11-23 17:26:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 95 [2021-11-23 17:26:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:52,162 INFO L225 Difference]: With dead ends: 12118 [2021-11-23 17:26:52,162 INFO L226 Difference]: Without dead ends: 6852 [2021-11-23 17:26:52,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 17:26:52,173 INFO L933 BasicCegarLoop]: 1595 mSDtfsCounter, 49 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3140 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:52,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 3140 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6852 states. [2021-11-23 17:26:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6852 to 6850. [2021-11-23 17:26:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6850 states, 6848 states have (on average 1.4567757009345794) internal successors, (9976), 6849 states have internal predecessors, (9976), 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 17:26:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6850 states to 6850 states and 9976 transitions. [2021-11-23 17:26:52,635 INFO L78 Accepts]: Start accepts. Automaton has 6850 states and 9976 transitions. Word has length 95 [2021-11-23 17:26:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:52,636 INFO L470 AbstractCegarLoop]: Abstraction has 6850 states and 9976 transitions. [2021-11-23 17:26:52,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:26:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6850 states and 9976 transitions. [2021-11-23 17:26:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:26:52,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:52,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:52,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:52,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:52,855 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -310750241, now seen corresponding path program 1 times [2021-11-23 17:26:52,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:52,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876975232] [2021-11-23 17:26:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:52,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:52,859 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:52,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:26:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:53,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:53,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:53,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876975232] [2021-11-23 17:26:53,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876975232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:53,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:53,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:53,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063680139] [2021-11-23 17:26:53,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:53,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:53,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:53,225 INFO L87 Difference]: Start difference. First operand 6850 states and 9976 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:26:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:53,387 INFO L93 Difference]: Finished difference Result 8706 states and 12651 transitions. [2021-11-23 17:26:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 95 [2021-11-23 17:26:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:53,398 INFO L225 Difference]: With dead ends: 8706 [2021-11-23 17:26:53,398 INFO L226 Difference]: Without dead ends: 3440 [2021-11-23 17:26:53,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 17:26:53,406 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 43 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:53,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:26:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-23 17:26:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3432. [2021-11-23 17:26:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3430 states have (on average 1.4790087463556851) internal successors, (5073), 3431 states have internal predecessors, (5073), 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 17:26:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 5073 transitions. [2021-11-23 17:26:53,562 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 5073 transitions. Word has length 95 [2021-11-23 17:26:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:53,563 INFO L470 AbstractCegarLoop]: Abstraction has 3432 states and 5073 transitions. [2021-11-23 17:26:53,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:26:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 5073 transitions. [2021-11-23 17:26:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:26:53,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:53,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:53,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:53,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:53,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:53,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1384314987, now seen corresponding path program 1 times [2021-11-23 17:26:53,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:53,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242146205] [2021-11-23 17:26:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:53,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:53,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:53,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:26:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:26:53,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:26:54,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:54,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242146205] [2021-11-23 17:26:54,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242146205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:54,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:54,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:54,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172456876] [2021-11-23 17:26:54,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:54,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:26:54,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:26:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:26:54,749 INFO L87 Difference]: Start difference. First operand 3432 states and 5073 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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 17:26:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:55,041 INFO L93 Difference]: Finished difference Result 5264 states and 7696 transitions. [2021-11-23 17:26:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:26:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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 95 [2021-11-23 17:26:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:55,050 INFO L225 Difference]: With dead ends: 5264 [2021-11-23 17:26:55,050 INFO L226 Difference]: Without dead ends: 3432 [2021-11-23 17:26:55,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:55,055 INFO L933 BasicCegarLoop]: 1543 mSDtfsCounter, 1461 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:55,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 3182 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-23 17:26:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-11-23 17:26:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 3432. [2021-11-23 17:26:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3430 states have (on average 1.4787172011661807) internal successors, (5072), 3431 states have internal predecessors, (5072), 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 17:26:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 5072 transitions. [2021-11-23 17:26:55,209 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 5072 transitions. Word has length 95 [2021-11-23 17:26:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:55,209 INFO L470 AbstractCegarLoop]: Abstraction has 3432 states and 5072 transitions. [2021-11-23 17:26:55,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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 17:26:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 5072 transitions. [2021-11-23 17:26:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:26:55,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:55,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:55,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:55,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:55,439 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash -49385617, now seen corresponding path program 1 times [2021-11-23 17:26:55,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:55,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043223163] [2021-11-23 17:26:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:55,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:55,442 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:55,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:26:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:55,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:26:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:26:56,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:56,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:56,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043223163] [2021-11-23 17:26:56,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043223163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:56,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:56,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:56,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669418926] [2021-11-23 17:26:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:56,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:26:56,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:26:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:26:56,240 INFO L87 Difference]: Start difference. First operand 3432 states and 5072 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 17:26:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:56,410 INFO L93 Difference]: Finished difference Result 5276 states and 7710 transitions. [2021-11-23 17:26:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:26:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 95 [2021-11-23 17:26:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:56,420 INFO L225 Difference]: With dead ends: 5276 [2021-11-23 17:26:56,420 INFO L226 Difference]: Without dead ends: 3432 [2021-11-23 17:26:56,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:56,425 INFO L933 BasicCegarLoop]: 1550 mSDtfsCounter, 1473 mSDsluCounter, 3076 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 4626 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:56,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1473 Valid, 4626 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-23 17:26:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-11-23 17:26:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 3432. [2021-11-23 17:26:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3430 states have (on average 1.4784256559766764) internal successors, (5071), 3431 states have internal predecessors, (5071), 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 17:26:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 5071 transitions. [2021-11-23 17:26:56,573 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 5071 transitions. Word has length 95 [2021-11-23 17:26:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:56,574 INFO L470 AbstractCegarLoop]: Abstraction has 3432 states and 5071 transitions. [2021-11-23 17:26:56,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 17:26:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 5071 transitions. [2021-11-23 17:26:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:26:56,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:56,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:56,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:56,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:56,791 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -928981393, now seen corresponding path program 1 times [2021-11-23 17:26:56,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:56,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61107012] [2021-11-23 17:26:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:56,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:56,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:56,794 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:56,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:26:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:26:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:26:57,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:57,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61107012] [2021-11-23 17:26:57,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61107012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:57,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:57,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:57,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206266140] [2021-11-23 17:26:57,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:57,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:26:57,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:57,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:26:57,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:26:57,651 INFO L87 Difference]: Start difference. First operand 3432 states and 5071 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:57,880 INFO L93 Difference]: Finished difference Result 5258 states and 7688 transitions. [2021-11-23 17:26:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:26:57,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 17:26:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:57,890 INFO L225 Difference]: With dead ends: 5258 [2021-11-23 17:26:57,890 INFO L226 Difference]: Without dead ends: 3410 [2021-11-23 17:26:57,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:57,896 INFO L933 BasicCegarLoop]: 1553 mSDtfsCounter, 1473 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 4623 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:57,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1473 Valid, 4623 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-11-23 17:26:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-11-23 17:26:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3410. [2021-11-23 17:26:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3408 states have (on average 1.4800469483568075) internal successors, (5044), 3409 states have internal predecessors, (5044), 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 17:26:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 5044 transitions. [2021-11-23 17:26:58,058 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 5044 transitions. Word has length 95 [2021-11-23 17:26:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:58,059 INFO L470 AbstractCegarLoop]: Abstraction has 3410 states and 5044 transitions. [2021-11-23 17:26:58,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 5044 transitions. [2021-11-23 17:26:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 17:26:58,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:58,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:58,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:58,275 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2108509511, now seen corresponding path program 1 times [2021-11-23 17:26:58,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430045842] [2021-11-23 17:26:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:58,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:58,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:58,278 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:58,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:26:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:58,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:00,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:01,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430045842] [2021-11-23 17:27:01,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430045842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284912467] [2021-11-23 17:27:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:01,188 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:01,191 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:01,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:27:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:01,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:01,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:03,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:04,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284912467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:04,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862705039] [2021-11-23 17:27:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:04,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:04,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:04,142 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:04,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:27:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:06,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:06,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862705039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:06,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:06,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:27:06,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815214040] [2021-11-23 17:27:06,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:06,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:27:06,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:27:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:27:06,607 INFO L87 Difference]: Start difference. First operand 3410 states and 5044 transitions. Second operand has 16 states, 16 states have (on average 11.0625) internal successors, (177), 15 states have internal predecessors, (177), 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 17:27:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:06,978 INFO L93 Difference]: Finished difference Result 5250 states and 7685 transitions. [2021-11-23 17:27:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:27:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.0625) internal successors, (177), 15 states have internal predecessors, (177), 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 96 [2021-11-23 17:27:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:06,985 INFO L225 Difference]: With dead ends: 5250 [2021-11-23 17:27:06,985 INFO L226 Difference]: Without dead ends: 3424 [2021-11-23 17:27:06,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:27:06,989 INFO L933 BasicCegarLoop]: 1537 mSDtfsCounter, 4434 mSDsluCounter, 12176 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4434 SdHoareTripleChecker+Valid, 13713 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:06,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4434 Valid, 13713 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2021-11-23 17:27:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-11-23 17:27:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 3422. [2021-11-23 17:27:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3420 states have (on average 1.4801169590643275) internal successors, (5062), 3421 states have internal predecessors, (5062), 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 17:27:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 5062 transitions. [2021-11-23 17:27:07,152 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 5062 transitions. Word has length 96 [2021-11-23 17:27:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:07,152 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 5062 transitions. [2021-11-23 17:27:07,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.0625) internal successors, (177), 15 states have internal predecessors, (177), 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 17:27:07,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 5062 transitions. [2021-11-23 17:27:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 17:27:07,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:07,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:07,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:07,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:07,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:07,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:07,769 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -428895251, now seen corresponding path program 1 times [2021-11-23 17:27:07,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:07,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693780356] [2021-11-23 17:27:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:07,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:07,771 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:07,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:27:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:08,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:08,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693780356] [2021-11-23 17:27:08,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693780356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:08,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:08,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:08,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65422635] [2021-11-23 17:27:08,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:08,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:08,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:08,115 INFO L87 Difference]: Start difference. First operand 3422 states and 5062 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 17:27:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:08,209 INFO L93 Difference]: Finished difference Result 4338 states and 6372 transitions. [2021-11-23 17:27:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-11-23 17:27:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:08,216 INFO L225 Difference]: With dead ends: 4338 [2021-11-23 17:27:08,217 INFO L226 Difference]: Without dead ends: 2512 [2021-11-23 17:27:08,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 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 17:27:08,222 INFO L933 BasicCegarLoop]: 1586 mSDtfsCounter, 40 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3115 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:08,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3115 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:27:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-11-23 17:27:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2510. [2021-11-23 17:27:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2508 states have (on average 1.4912280701754386) internal successors, (3740), 2509 states have internal predecessors, (3740), 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 17:27:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 3740 transitions. [2021-11-23 17:27:08,291 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 3740 transitions. Word has length 96 [2021-11-23 17:27:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:08,291 INFO L470 AbstractCegarLoop]: Abstraction has 2510 states and 3740 transitions. [2021-11-23 17:27:08,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 17:27:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 3740 transitions. [2021-11-23 17:27:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:27:08,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:08,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:08,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:08,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:08,512 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:08,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1956505184, now seen corresponding path program 1 times [2021-11-23 17:27:08,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:08,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213588744] [2021-11-23 17:27:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:08,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:08,514 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:08,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:27:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:08,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:10,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:11,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213588744] [2021-11-23 17:27:11,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213588744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051789251] [2021-11-23 17:27:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:11,560 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:11,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:11,561 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:11,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 17:27:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:11,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:13,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:14,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051789251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:14,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532694161] [2021-11-23 17:27:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:14,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:14,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:14,280 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:14,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 17:27:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:14,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:16,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:16,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532694161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:16,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:16,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:27:16,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863717037] [2021-11-23 17:27:16,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:16,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:27:16,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:27:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:27:16,810 INFO L87 Difference]: Start difference. First operand 2510 states and 3740 transitions. Second operand has 16 states, 16 states have (on average 11.4375) internal successors, (183), 15 states have internal predecessors, (183), 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 17:27:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:17,178 INFO L93 Difference]: Finished difference Result 3438 states and 5061 transitions. [2021-11-23 17:27:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:27:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.4375) internal successors, (183), 15 states have internal predecessors, (183), 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 97 [2021-11-23 17:27:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:17,183 INFO L225 Difference]: With dead ends: 3438 [2021-11-23 17:27:17,183 INFO L226 Difference]: Without dead ends: 2524 [2021-11-23 17:27:17,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:27:17,187 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 4393 mSDsluCounter, 12283 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4393 SdHoareTripleChecker+Valid, 13818 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:17,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4393 Valid, 13818 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2021-11-23 17:27:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-11-23 17:27:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2522. [2021-11-23 17:27:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2520 states have (on average 1.4912698412698413) internal successors, (3758), 2521 states have internal predecessors, (3758), 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 17:27:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3758 transitions. [2021-11-23 17:27:17,272 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3758 transitions. Word has length 97 [2021-11-23 17:27:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:17,272 INFO L470 AbstractCegarLoop]: Abstraction has 2522 states and 3758 transitions. [2021-11-23 17:27:17,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.4375) internal successors, (183), 15 states have internal predecessors, (183), 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 17:27:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3758 transitions. [2021-11-23 17:27:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 17:27:17,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:17,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:17,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:17,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:17,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:17,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:17,885 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1360546604, now seen corresponding path program 1 times [2021-11-23 17:27:17,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:17,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478699741] [2021-11-23 17:27:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:17,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:17,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:17,888 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:17,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:27:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:17,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:18,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:18,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:18,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478699741] [2021-11-23 17:27:18,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478699741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:18,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:18,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466836594] [2021-11-23 17:27:18,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:18,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:18,162 INFO L87 Difference]: Start difference. First operand 2522 states and 3758 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 17:27:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:18,209 INFO L93 Difference]: Finished difference Result 2982 states and 4408 transitions. [2021-11-23 17:27:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-23 17:27:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:18,212 INFO L225 Difference]: With dead ends: 2982 [2021-11-23 17:27:18,212 INFO L226 Difference]: Without dead ends: 2068 [2021-11-23 17:27:18,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 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 17:27:18,214 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 35 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3099 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:18,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3099 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:27:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-11-23 17:27:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 2066. [2021-11-23 17:27:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2064 states have (on average 1.502906976744186) internal successors, (3102), 2065 states have internal predecessors, (3102), 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 17:27:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3102 transitions. [2021-11-23 17:27:18,268 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3102 transitions. Word has length 97 [2021-11-23 17:27:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:18,269 INFO L470 AbstractCegarLoop]: Abstraction has 2066 states and 3102 transitions. [2021-11-23 17:27:18,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 17:27:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3102 transitions. [2021-11-23 17:27:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 17:27:18,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:18,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:18,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:18,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:18,485 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1843193776, now seen corresponding path program 1 times [2021-11-23 17:27:18,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:18,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480814523] [2021-11-23 17:27:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:18,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:18,486 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:18,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:27:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:18,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:20,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:21,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:21,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480814523] [2021-11-23 17:27:21,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480814523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:21,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1462928774] [2021-11-23 17:27:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:21,542 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:21,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:21,547 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:21,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 17:27:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:21,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:23,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:24,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1462928774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:24,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455093527] [2021-11-23 17:27:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:24,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:24,509 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:24,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 17:27:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:26,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455093527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:27,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:27,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:27:27,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11597659] [2021-11-23 17:27:27,145 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:27,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:27:27,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:27:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:27:27,146 INFO L87 Difference]: Start difference. First operand 2066 states and 3102 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 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 17:27:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:27,493 INFO L93 Difference]: Finished difference Result 2538 states and 3769 transitions. [2021-11-23 17:27:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:27:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 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 98 [2021-11-23 17:27:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:27,496 INFO L225 Difference]: With dead ends: 2538 [2021-11-23 17:27:27,496 INFO L226 Difference]: Without dead ends: 2080 [2021-11-23 17:27:27,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:27:27,498 INFO L933 BasicCegarLoop]: 1533 mSDtfsCounter, 5886 mSDsluCounter, 10844 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5886 SdHoareTripleChecker+Valid, 12377 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:27,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5886 Valid, 12377 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2021-11-23 17:27:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-11-23 17:27:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2078. [2021-11-23 17:27:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2076 states have (on average 1.5028901734104045) internal successors, (3120), 2077 states have internal predecessors, (3120), 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 17:27:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3120 transitions. [2021-11-23 17:27:27,563 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3120 transitions. Word has length 98 [2021-11-23 17:27:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:27,563 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 3120 transitions. [2021-11-23 17:27:27,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 15 states have internal predecessors, (189), 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 17:27:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3120 transitions. [2021-11-23 17:27:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 17:27:27,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:27,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:27,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:27,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-23 17:27:27,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:28,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:28,179 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -625208378, now seen corresponding path program 1 times [2021-11-23 17:27:28,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810017069] [2021-11-23 17:27:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:28,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:28,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:28,181 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:28,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:27:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:28,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:28,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:28,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810017069] [2021-11-23 17:27:28,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810017069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:28,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:28,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:28,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333343466] [2021-11-23 17:27:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:28,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:28,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:28,465 INFO L87 Difference]: Start difference. First operand 2078 states and 3120 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 17:27:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:28,526 INFO L93 Difference]: Finished difference Result 2310 states and 3443 transitions. [2021-11-23 17:27:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 98 [2021-11-23 17:27:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:28,529 INFO L225 Difference]: With dead ends: 2310 [2021-11-23 17:27:28,529 INFO L226 Difference]: Without dead ends: 1852 [2021-11-23 17:27:28,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 96 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 17:27:28,530 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 30 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:28,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 3083 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:27:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-11-23 17:27:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1850. [2021-11-23 17:27:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1848 states have (on average 1.5119047619047619) internal successors, (2794), 1849 states have internal predecessors, (2794), 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 17:27:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2794 transitions. [2021-11-23 17:27:28,566 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2794 transitions. Word has length 98 [2021-11-23 17:27:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:28,567 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2794 transitions. [2021-11-23 17:27:28,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 17:27:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2794 transitions. [2021-11-23 17:27:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:27:28,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:28,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:28,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:28,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:28,770 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1584883174, now seen corresponding path program 1 times [2021-11-23 17:27:28,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:28,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853670160] [2021-11-23 17:27:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:28,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:28,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:28,772 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:28,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:27:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:28,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:27:28,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:27:30,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:30,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:30,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853670160] [2021-11-23 17:27:30,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853670160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:30,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:30,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:27:30,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348095667] [2021-11-23 17:27:30,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:30,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:27:30,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:27:30,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:30,432 INFO L87 Difference]: Start difference. First operand 1850 states and 2794 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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 17:27:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:30,750 INFO L93 Difference]: Finished difference Result 2348 states and 3478 transitions. [2021-11-23 17:27:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:27:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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 99 [2021-11-23 17:27:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:30,753 INFO L225 Difference]: With dead ends: 2348 [2021-11-23 17:27:30,753 INFO L226 Difference]: Without dead ends: 2270 [2021-11-23 17:27:30,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:30,754 INFO L933 BasicCegarLoop]: 1638 mSDtfsCounter, 5100 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5100 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:30,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5100 Valid, 3512 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:27:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-11-23 17:27:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2006. [2021-11-23 17:27:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2004 states have (on average 1.498003992015968) internal successors, (3002), 2005 states have internal predecessors, (3002), 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 17:27:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3002 transitions. [2021-11-23 17:27:30,799 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3002 transitions. Word has length 99 [2021-11-23 17:27:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:30,799 INFO L470 AbstractCegarLoop]: Abstraction has 2006 states and 3002 transitions. [2021-11-23 17:27:30,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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 17:27:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3002 transitions. [2021-11-23 17:27:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:27:30,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:30,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:30,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:31,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:31,002 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1207725015, now seen corresponding path program 1 times [2021-11-23 17:27:31,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791158605] [2021-11-23 17:27:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:31,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:31,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:31,004 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:31,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 17:27:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:31,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:27:31,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:27:32,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:32,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791158605] [2021-11-23 17:27:32,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791158605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:32,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:32,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:27:32,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550959280] [2021-11-23 17:27:32,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:32,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:27:32,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:27:32,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:32,785 INFO L87 Difference]: Start difference. First operand 2006 states and 3002 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 17:27:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:33,022 INFO L93 Difference]: Finished difference Result 2424 states and 3580 transitions. [2021-11-23 17:27:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:27:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 99 [2021-11-23 17:27:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:33,026 INFO L225 Difference]: With dead ends: 2424 [2021-11-23 17:27:33,026 INFO L226 Difference]: Without dead ends: 2194 [2021-11-23 17:27:33,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:33,027 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 4858 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4858 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:33,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4858 Valid, 3493 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:27:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-23 17:27:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 1930. [2021-11-23 17:27:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1928 states have (on average 1.5010373443983402) internal successors, (2894), 1929 states have internal predecessors, (2894), 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 17:27:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2894 transitions. [2021-11-23 17:27:33,085 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2894 transitions. Word has length 99 [2021-11-23 17:27:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:33,086 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 2894 transitions. [2021-11-23 17:27:33,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 17:27:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2894 transitions. [2021-11-23 17:27:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:27:33,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:33,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:33,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:33,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:33,316 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1354620343, now seen corresponding path program 1 times [2021-11-23 17:27:33,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:33,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866628035] [2021-11-23 17:27:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:33,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:33,318 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:33,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 17:27:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:27:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:27:35,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:35,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:35,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866628035] [2021-11-23 17:27:35,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866628035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:35,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:35,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:27:35,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075569705] [2021-11-23 17:27:35,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:35,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:27:35,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:27:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:35,006 INFO L87 Difference]: Start difference. First operand 1930 states and 2894 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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 17:27:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:35,282 INFO L93 Difference]: Finished difference Result 2352 states and 3476 transitions. [2021-11-23 17:27:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:27:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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 99 [2021-11-23 17:27:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:35,285 INFO L225 Difference]: With dead ends: 2352 [2021-11-23 17:27:35,285 INFO L226 Difference]: Without dead ends: 2274 [2021-11-23 17:27:35,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:35,287 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 4835 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4835 SdHoareTripleChecker+Valid, 3548 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:35,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4835 Valid, 3548 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:27:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-11-23 17:27:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2016. [2021-11-23 17:27:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2014 states have (on average 1.493545183714002) internal successors, (3008), 2015 states have internal predecessors, (3008), 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 17:27:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3008 transitions. [2021-11-23 17:27:35,336 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3008 transitions. Word has length 99 [2021-11-23 17:27:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:35,337 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3008 transitions. [2021-11-23 17:27:35,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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 17:27:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3008 transitions. [2021-11-23 17:27:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:27:35,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:35,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:35,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:35,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:35,551 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:35,551 INFO L85 PathProgramCache]: Analyzing trace with hash 994268218, now seen corresponding path program 1 times [2021-11-23 17:27:35,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:35,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885572312] [2021-11-23 17:27:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:35,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:35,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:35,553 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:35,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 17:27:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:35,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:27:35,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:27:37,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:37,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885572312] [2021-11-23 17:27:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885572312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:37,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:37,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:27:37,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710289292] [2021-11-23 17:27:37,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:37,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:27:37,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:27:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:37,526 INFO L87 Difference]: Start difference. First operand 2016 states and 3008 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 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 17:27:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:37,812 INFO L93 Difference]: Finished difference Result 2438 states and 3590 transitions. [2021-11-23 17:27:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:27:37,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 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 99 [2021-11-23 17:27:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:37,816 INFO L225 Difference]: With dead ends: 2438 [2021-11-23 17:27:37,816 INFO L226 Difference]: Without dead ends: 2360 [2021-11-23 17:27:37,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:37,818 INFO L933 BasicCegarLoop]: 1660 mSDtfsCounter, 2025 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:37,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 3683 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:27:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-11-23 17:27:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2108. [2021-11-23 17:27:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2106 states have (on average 1.486229819563153) internal successors, (3130), 2107 states have internal predecessors, (3130), 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 17:27:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3130 transitions. [2021-11-23 17:27:37,867 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3130 transitions. Word has length 99 [2021-11-23 17:27:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:37,867 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3130 transitions. [2021-11-23 17:27:37,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 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 17:27:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3130 transitions. [2021-11-23 17:27:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:27:37,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:37,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:37,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:38,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:38,069 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1463973783, now seen corresponding path program 1 times [2021-11-23 17:27:38,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:38,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611903817] [2021-11-23 17:27:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:38,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:38,071 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:38,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:27:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:27:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:27:39,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:39,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611903817] [2021-11-23 17:27:39,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611903817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:39,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:39,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:27:39,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385579163] [2021-11-23 17:27:39,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:39,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:27:39,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:39,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:27:39,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:39,841 INFO L87 Difference]: Start difference. First operand 2108 states and 3130 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 17:27:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:40,071 INFO L93 Difference]: Finished difference Result 2530 states and 3712 transitions. [2021-11-23 17:27:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:27:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 99 [2021-11-23 17:27:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:40,075 INFO L225 Difference]: With dead ends: 2530 [2021-11-23 17:27:40,075 INFO L226 Difference]: Without dead ends: 2452 [2021-11-23 17:27:40,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:40,076 INFO L933 BasicCegarLoop]: 1647 mSDtfsCounter, 3484 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3484 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:40,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3484 Valid, 3567 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:27:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-11-23 17:27:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2200. [2021-11-23 17:27:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2198 states have (on average 1.4795268425841674) internal successors, (3252), 2199 states have internal predecessors, (3252), 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 17:27:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3252 transitions. [2021-11-23 17:27:40,137 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3252 transitions. Word has length 99 [2021-11-23 17:27:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:40,138 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 3252 transitions. [2021-11-23 17:27:40,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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 17:27:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3252 transitions. [2021-11-23 17:27:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:27:40,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:40,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:40,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:40,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:40,340 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash 909882106, now seen corresponding path program 1 times [2021-11-23 17:27:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549423888] [2021-11-23 17:27:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:40,343 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:40,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 17:27:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:27:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:53,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:00,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549423888] [2021-11-23 17:28:00,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549423888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [375207527] [2021-11-23 17:28:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:00,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:00,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:00,157 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:00,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-23 17:28:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:00,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:28:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:09,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [375207527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268591340] [2021-11-23 17:28:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:09,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:28:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:28:09,076 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:28:09,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 17:28:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:28:09,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:15,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:17,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268591340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:17,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:28:17,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 15, 15, 16, 15] total 94 [2021-11-23 17:28:17,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019194591] [2021-11-23 17:28:17,179 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:28:17,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-23 17:28:17,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-23 17:28:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=7642, Unknown=0, NotChecked=0, Total=8742 [2021-11-23 17:28:17,186 INFO L87 Difference]: Start difference. First operand 2200 states and 3252 transitions. Second operand has 94 states, 94 states have (on average 4.287234042553192) internal successors, (403), 94 states have internal predecessors, (403), 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 17:28:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:20,786 INFO L93 Difference]: Finished difference Result 2614 states and 3778 transitions. [2021-11-23 17:28:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 17:28:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 4.287234042553192) internal successors, (403), 94 states have internal predecessors, (403), 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 100 [2021-11-23 17:28:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:20,790 INFO L225 Difference]: With dead ends: 2614 [2021-11-23 17:28:20,790 INFO L226 Difference]: Without dead ends: 2456 [2021-11-23 17:28:20,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=1265, Invalid=8241, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 17:28:20,794 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 16256 mSDsluCounter, 28472 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16256 SdHoareTripleChecker+Valid, 30019 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:20,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16256 Valid, 30019 Invalid, 1101 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 789 Invalid, 0 Unknown, 287 Unchecked, 1.7s Time] [2021-11-23 17:28:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-11-23 17:28:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2216. [2021-11-23 17:28:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2214 states have (on average 1.477416440831075) internal successors, (3271), 2215 states have internal predecessors, (3271), 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 17:28:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3271 transitions. [2021-11-23 17:28:20,870 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3271 transitions. Word has length 100 [2021-11-23 17:28:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 2216 states and 3271 transitions. [2021-11-23 17:28:20,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 4.287234042553192) internal successors, (403), 94 states have internal predecessors, (403), 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 17:28:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3271 transitions. [2021-11-23 17:28:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:28:20,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:20,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:28:20,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:21,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:21,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:28:21,488 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -952430272, now seen corresponding path program 1 times [2021-11-23 17:28:21,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:21,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2704166] [2021-11-23 17:28:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:21,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:21,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:21,490 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:21,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 17:28:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:21,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 17:28:21,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:32,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:41,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:41,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2704166] [2021-11-23 17:28:41,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2704166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:41,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1685121506] [2021-11-23 17:28:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:41,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:41,165 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:41,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-23 17:28:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 17:28:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:53,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1685121506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316516953] [2021-11-23 17:28:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:58,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:28:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:28:58,535 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:28:58,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 17:28:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 17:28:58,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:05,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:09,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316516953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:09,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:29:09,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32, 30, 33, 32] total 88 [2021-11-23 17:29:09,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550020276] [2021-11-23 17:29:09,161 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:29:09,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-23 17:29:09,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-23 17:29:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=6696, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 17:29:09,165 INFO L87 Difference]: Start difference. First operand 2216 states and 3271 transitions. Second operand has 88 states, 88 states have (on average 2.9545454545454546) internal successors, (260), 88 states have internal predecessors, (260), 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 17:29:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:12,479 INFO L93 Difference]: Finished difference Result 2435 states and 3550 transitions. [2021-11-23 17:29:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 17:29:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.9545454545454546) internal successors, (260), 88 states have internal predecessors, (260), 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 100 [2021-11-23 17:29:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:12,483 INFO L225 Difference]: With dead ends: 2435 [2021-11-23 17:29:12,483 INFO L226 Difference]: Without dead ends: 2267 [2021-11-23 17:29:12,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1108, Invalid=7264, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 17:29:12,487 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 20485 mSDsluCounter, 36247 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20485 SdHoareTripleChecker+Valid, 37768 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:12,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20485 Valid, 37768 Invalid, 1005 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 717 Invalid, 0 Unknown, 256 Unchecked, 1.7s Time] [2021-11-23 17:29:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-23 17:29:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2217. [2021-11-23 17:29:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2215 states have (on average 1.4772009029345372) internal successors, (3272), 2216 states have internal predecessors, (3272), 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 17:29:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3272 transitions. [2021-11-23 17:29:12,557 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3272 transitions. Word has length 100 [2021-11-23 17:29:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:12,557 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 3272 transitions. [2021-11-23 17:29:12,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.9545454545454546) internal successors, (260), 88 states have internal predecessors, (260), 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 17:29:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3272 transitions. [2021-11-23 17:29:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:29:12,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:12,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:29:12,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-11-23 17:29:12,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:12,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-23 17:29:13,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:29:13,160 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:29:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash 761555741, now seen corresponding path program 1 times [2021-11-23 17:29:13,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:13,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307931894] [2021-11-23 17:29:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:13,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:13,162 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:13,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 17:29:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:29:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:15,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:16,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307931894] [2021-11-23 17:29:16,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307931894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:16,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1684463931] [2021-11-23 17:29:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:16,017 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:16,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:16,018 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:16,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-23 17:29:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:29:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:27,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:34,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1684463931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916487248] [2021-11-23 17:29:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:34,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:34,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:34,682 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:34,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 17:29:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:29:34,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:50,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:55,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916487248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:55,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:29:55,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 32, 28, 32, 30] total 105 [2021-11-23 17:29:55,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605616855] [2021-11-23 17:29:55,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:29:55,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-23 17:29:55,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:55,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-23 17:29:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=9929, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 17:29:55,878 INFO L87 Difference]: Start difference. First operand 2217 states and 3272 transitions. Second operand has 105 states, 105 states have (on average 4.171428571428572) internal successors, (438), 105 states have internal predecessors, (438), 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 17:30:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:02,436 INFO L93 Difference]: Finished difference Result 2442 states and 3561 transitions. [2021-11-23 17:30:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 17:30:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 4.171428571428572) internal successors, (438), 105 states have internal predecessors, (438), 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 100 [2021-11-23 17:30:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:02,439 INFO L225 Difference]: With dead ends: 2442 [2021-11-23 17:30:02,439 INFO L226 Difference]: Without dead ends: 2262 [2021-11-23 17:30:02,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4805 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=1463, Invalid=13789, Unknown=0, NotChecked=0, Total=15252 [2021-11-23 17:30:02,444 INFO L933 BasicCegarLoop]: 1522 mSDtfsCounter, 16120 mSDsluCounter, 45408 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16120 SdHoareTripleChecker+Valid, 46930 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:02,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16120 Valid, 46930 Invalid, 832 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 472 Invalid, 0 Unknown, 340 Unchecked, 0.9s Time] [2021-11-23 17:30:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-11-23 17:30:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2218. [2021-11-23 17:30:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2216 states have (on average 1.476985559566787) internal successors, (3273), 2217 states have internal predecessors, (3273), 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 17:30:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3273 transitions. [2021-11-23 17:30:02,498 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3273 transitions. Word has length 100 [2021-11-23 17:30:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:02,498 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 3273 transitions. [2021-11-23 17:30:02,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 4.171428571428572) internal successors, (438), 105 states have internal predecessors, (438), 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 17:30:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3273 transitions. [2021-11-23 17:30:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:30:02,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:02,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:02,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-11-23 17:30:02,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-23 17:30:02,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:03,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:30:03,104 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:03,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1857440928, now seen corresponding path program 1 times [2021-11-23 17:30:03,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:03,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286617780] [2021-11-23 17:30:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:03,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:03,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:03,106 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:03,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 17:30:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:30:03,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:04,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:04,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286617780] [2021-11-23 17:30:04,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286617780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:04,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028675262] [2021-11-23 17:30:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:04,848 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:04,849 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:04,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-23 17:30:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:30:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:11,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:15,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028675262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:15,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708407089] [2021-11-23 17:30:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:15,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:30:15,880 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:30:15,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 17:30:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:30:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:28,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:33,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708407089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:33,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:30:33,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 26, 25, 33, 30] total 90 [2021-11-23 17:30:33,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426459815] [2021-11-23 17:30:33,194 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:30:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-23 17:30:33,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-23 17:30:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=7103, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 17:30:33,196 INFO L87 Difference]: Start difference. First operand 2218 states and 3273 transitions. Second operand has 90 states, 90 states have (on average 4.288888888888889) internal successors, (386), 90 states have internal predecessors, (386), 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 17:30:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:37,501 INFO L93 Difference]: Finished difference Result 2420 states and 3534 transitions. [2021-11-23 17:30:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 17:30:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.288888888888889) internal successors, (386), 90 states have internal predecessors, (386), 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 100 [2021-11-23 17:30:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:37,504 INFO L225 Difference]: With dead ends: 2420 [2021-11-23 17:30:37,504 INFO L226 Difference]: Without dead ends: 2228 [2021-11-23 17:30:37,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1307, Invalid=9613, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 17:30:37,506 INFO L933 BasicCegarLoop]: 1523 mSDtfsCounter, 16232 mSDsluCounter, 41105 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16232 SdHoareTripleChecker+Valid, 42628 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:37,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16232 Valid, 42628 Invalid, 1101 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 717 Invalid, 0 Unknown, 367 Unchecked, 1.4s Time] [2021-11-23 17:30:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-11-23 17:30:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2190. [2021-11-23 17:30:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2188 states have (on average 1.4789762340036563) internal successors, (3236), 2189 states have internal predecessors, (3236), 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 17:30:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3236 transitions. [2021-11-23 17:30:37,580 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3236 transitions. Word has length 100 [2021-11-23 17:30:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:37,581 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 3236 transitions. [2021-11-23 17:30:37,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.288888888888889) internal successors, (386), 90 states have internal predecessors, (386), 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 17:30:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3236 transitions. [2021-11-23 17:30:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:30:37,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:37,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:37,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:37,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-11-23 17:30:38,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:38,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:38,183 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash -366632657, now seen corresponding path program 1 times [2021-11-23 17:30:38,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:38,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910889751] [2021-11-23 17:30:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:38,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:38,186 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:38,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 17:30:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:38,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 17:30:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:10,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:32,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:32,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910889751] [2021-11-23 17:31:32,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910889751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:32,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151225781] [2021-11-23 17:31:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:32,549 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:32,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:32,550 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:32,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-23 17:31:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:32,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:31:32,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:41,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:44,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1151225781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:44,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702966440] [2021-11-23 17:31:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:44,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:44,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:44,884 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 17:31:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:44,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:31:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:14,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:19,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702966440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:19,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:19,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 30, 11, 9, 35, 28] total 102 [2021-11-23 17:32:19,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836029579] [2021-11-23 17:32:19,976 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:19,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-23 17:32:19,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:19,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-23 17:32:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=9099, Unknown=0, NotChecked=0, Total=10302 [2021-11-23 17:32:19,978 INFO L87 Difference]: Start difference. First operand 2190 states and 3236 transitions. Second operand has 102 states, 102 states have (on average 3.950980392156863) internal successors, (403), 102 states have internal predecessors, (403), 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 17:32:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:22,299 INFO L93 Difference]: Finished difference Result 2375 states and 3480 transitions. [2021-11-23 17:32:22,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 17:32:22,300 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.950980392156863) internal successors, (403), 102 states have internal predecessors, (403), 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 101 [2021-11-23 17:32:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:22,303 INFO L225 Difference]: With dead ends: 2375 [2021-11-23 17:32:22,303 INFO L226 Difference]: Without dead ends: 2221 [2021-11-23 17:32:22,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 501 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4664 ImplicationChecksByTransitivity, 78.9s TimeCoverageRelationStatistics Valid=1284, Invalid=9428, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 17:32:22,305 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 7433 mSDsluCounter, 32454 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7433 SdHoareTripleChecker+Valid, 33970 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:22,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7433 Valid, 33970 Invalid, 593 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 343 Invalid, 0 Unknown, 242 Unchecked, 0.7s Time] [2021-11-23 17:32:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-11-23 17:32:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2196. [2021-11-23 17:32:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2194 states have (on average 1.4781221513217866) internal successors, (3243), 2195 states have internal predecessors, (3243), 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 17:32:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3243 transitions. [2021-11-23 17:32:22,364 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3243 transitions. Word has length 101 [2021-11-23 17:32:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:22,364 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 3243 transitions. [2021-11-23 17:32:22,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.950980392156863) internal successors, (403), 102 states have internal predecessors, (403), 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 17:32:22,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3243 transitions. [2021-11-23 17:32:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:32:22,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:22,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:22,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:22,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:22,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-23 17:32:22,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:22,966 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1192957702, now seen corresponding path program 1 times [2021-11-23 17:32:22,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104929171] [2021-11-23 17:32:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:22,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:22,968 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:22,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 17:32:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:32:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:23,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:23,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104929171] [2021-11-23 17:32:23,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104929171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:23,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1994762408] [2021-11-23 17:32:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:23,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:23,842 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:23,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-23 17:32:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:23,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:32:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:24,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:24,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1994762408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:24,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841760463] [2021-11-23 17:32:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:24,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:24,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:24,794 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:24,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 17:32:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:32:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:25,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:25,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841760463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:25,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:25,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:32:25,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860478021] [2021-11-23 17:32:25,719 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:25,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:32:25,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:32:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:32:25,720 INFO L87 Difference]: Start difference. First operand 2196 states and 3243 transitions. Second operand has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 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 17:32:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:25,907 INFO L93 Difference]: Finished difference Result 3594 states and 5087 transitions. [2021-11-23 17:32:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:32:25,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 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 101 [2021-11-23 17:32:25,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:25,910 INFO L225 Difference]: With dead ends: 3594 [2021-11-23 17:32:25,910 INFO L226 Difference]: Without dead ends: 3060 [2021-11-23 17:32:25,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 593 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:32:25,912 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1658 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:25,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 3397 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-11-23 17:32:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2021-11-23 17:32:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2968. [2021-11-23 17:32:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2968 states, 2966 states have (on average 1.4315576534052596) internal successors, (4246), 2967 states have internal predecessors, (4246), 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 17:32:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2968 states to 2968 states and 4246 transitions. [2021-11-23 17:32:26,012 INFO L78 Accepts]: Start accepts. Automaton has 2968 states and 4246 transitions. Word has length 101 [2021-11-23 17:32:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:26,012 INFO L470 AbstractCegarLoop]: Abstraction has 2968 states and 4246 transitions. [2021-11-23 17:32:26,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 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 17:32:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2968 states and 4246 transitions. [2021-11-23 17:32:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:32:26,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:26,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:26,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:26,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:26,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-23 17:32:26,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:26,620 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1776562862, now seen corresponding path program 1 times [2021-11-23 17:32:26,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:26,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315346974] [2021-11-23 17:32:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:26,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:26,621 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:26,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 17:32:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:32:26,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:30,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:32,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315346974] [2021-11-23 17:32:32,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315346974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61086524] [2021-11-23 17:32:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:32,430 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:32,431 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:32,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-23 17:32:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:32,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:32:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:36,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:37,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61086524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295929657] [2021-11-23 17:32:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:37,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:37,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:37,491 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:37,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 17:32:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:32:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:42,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:44,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295929657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:44,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:44,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17, 15, 16, 14] total 54 [2021-11-23 17:32:44,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173081071] [2021-11-23 17:32:44,608 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:44,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 17:32:44,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 17:32:44,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2558, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 17:32:44,610 INFO L87 Difference]: Start difference. First operand 2968 states and 4246 transitions. Second operand has 54 states, 54 states have (on average 6.388888888888889) internal successors, (345), 54 states have internal predecessors, (345), 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 17:32:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:47,356 INFO L93 Difference]: Finished difference Result 3891 states and 5417 transitions. [2021-11-23 17:32:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:32:47,356 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.388888888888889) internal successors, (345), 54 states have internal predecessors, (345), 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 101 [2021-11-23 17:32:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:47,359 INFO L225 Difference]: With dead ends: 3891 [2021-11-23 17:32:47,359 INFO L226 Difference]: Without dead ends: 3455 [2021-11-23 17:32:47,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=604, Invalid=4946, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 17:32:47,362 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3177 mSDsluCounter, 38791 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3177 SdHoareTripleChecker+Valid, 40355 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:47,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3177 Valid, 40355 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 213 Unchecked, 0.2s Time] [2021-11-23 17:32:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2021-11-23 17:32:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 2985. [2021-11-23 17:32:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2985 states, 2983 states have (on average 1.430439155212873) internal successors, (4267), 2984 states have internal predecessors, (4267), 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 17:32:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 4267 transitions. [2021-11-23 17:32:47,487 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 4267 transitions. Word has length 101 [2021-11-23 17:32:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:47,488 INFO L470 AbstractCegarLoop]: Abstraction has 2985 states and 4267 transitions. [2021-11-23 17:32:47,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.388888888888889) internal successors, (345), 54 states have internal predecessors, (345), 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 17:32:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 4267 transitions. [2021-11-23 17:32:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:32:47,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:47,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:47,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:47,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2021-11-23 17:32:47,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:48,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:48,090 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1705888860, now seen corresponding path program 1 times [2021-11-23 17:32:48,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:48,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34148989] [2021-11-23 17:32:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:48,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:48,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:48,092 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:48,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 17:32:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:48,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:32:48,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:50,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:51,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:51,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34148989] [2021-11-23 17:32:51,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34148989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:51,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973855582] [2021-11-23 17:32:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:51,032 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:51,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:51,033 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:51,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-23 17:32:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:32:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:53,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:54,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973855582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392737201] [2021-11-23 17:32:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:54,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:54,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:54,793 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:54,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-23 17:32:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:32:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:57,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:57,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392737201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:57,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:57,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 10, 9] total 33 [2021-11-23 17:32:57,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602377054] [2021-11-23 17:32:57,594 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:57,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 17:32:57,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 17:32:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:32:57,596 INFO L87 Difference]: Start difference. First operand 2985 states and 4267 transitions. Second operand has 33 states, 33 states have (on average 10.303030303030303) internal successors, (340), 33 states have internal predecessors, (340), 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 17:32:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:58,977 INFO L93 Difference]: Finished difference Result 3825 states and 5329 transitions. [2021-11-23 17:32:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 17:32:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 10.303030303030303) internal successors, (340), 33 states have internal predecessors, (340), 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 101 [2021-11-23 17:32:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:58,981 INFO L225 Difference]: With dead ends: 3825 [2021-11-23 17:32:58,981 INFO L226 Difference]: Without dead ends: 3371 [2021-11-23 17:32:58,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 17:32:58,983 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 3002 mSDsluCounter, 19559 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3002 SdHoareTripleChecker+Valid, 21128 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:58,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3002 Valid, 21128 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 211 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2021-11-23 17:32:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-11-23 17:32:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2901. [2021-11-23 17:32:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2899 states have (on average 1.4332528458088996) internal successors, (4155), 2900 states have internal predecessors, (4155), 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 17:32:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 4155 transitions. [2021-11-23 17:32:59,093 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 4155 transitions. Word has length 101 [2021-11-23 17:32:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:59,093 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 4155 transitions. [2021-11-23 17:32:59,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.303030303030303) internal successors, (340), 33 states have internal predecessors, (340), 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 17:32:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 4155 transitions. [2021-11-23 17:32:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:32:59,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:59,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:59,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-11-23 17:32:59,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2021-11-23 17:32:59,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:59,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:59,695 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1073158578, now seen corresponding path program 1 times [2021-11-23 17:32:59,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74788496] [2021-11-23 17:32:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:59,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:59,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:59,698 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:59,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 17:32:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:32:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:04,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:05,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:05,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74788496] [2021-11-23 17:33:05,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74788496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:05,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1540508454] [2021-11-23 17:33:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:05,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:05,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:05,924 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:05,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-11-23 17:33:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:06,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:33:06,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:11,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1540508454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:11,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384933875] [2021-11-23 17:33:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:11,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:11,069 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:33:11,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-23 17:33:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:11,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:33:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:15,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:18,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384933875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:18,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:18,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17, 15, 17, 16] total 49 [2021-11-23 17:33:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722804248] [2021-11-23 17:33:18,461 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:18,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 17:33:18,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 17:33:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1986, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 17:33:18,463 INFO L87 Difference]: Start difference. First operand 2901 states and 4155 transitions. Second operand has 49 states, 49 states have (on average 6.224489795918367) internal successors, (305), 49 states have internal predecessors, (305), 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 17:33:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:19,159 INFO L93 Difference]: Finished difference Result 3824 states and 5325 transitions. [2021-11-23 17:33:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 17:33:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.224489795918367) internal successors, (305), 49 states have internal predecessors, (305), 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 101 [2021-11-23 17:33:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:19,163 INFO L225 Difference]: With dead ends: 3824 [2021-11-23 17:33:19,164 INFO L226 Difference]: Without dead ends: 3388 [2021-11-23 17:33:19,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=429, Invalid=2121, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 17:33:19,166 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 1738 mSDsluCounter, 23595 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 25165 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:19,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1738 Valid, 25165 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 261 Unchecked, 0.3s Time] [2021-11-23 17:33:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2021-11-23 17:33:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 2907. [2021-11-23 17:33:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2905 states have (on average 1.4327022375215146) internal successors, (4162), 2906 states have internal predecessors, (4162), 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 17:33:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4162 transitions. [2021-11-23 17:33:19,319 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4162 transitions. Word has length 101 [2021-11-23 17:33:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:19,319 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 4162 transitions. [2021-11-23 17:33:19,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.224489795918367) internal successors, (305), 49 states have internal predecessors, (305), 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 17:33:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4162 transitions. [2021-11-23 17:33:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:33:19,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:19,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:19,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:19,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:19,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:19,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:19,939 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -577526894, now seen corresponding path program 1 times [2021-11-23 17:33:19,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:19,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804737642] [2021-11-23 17:33:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:19,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:19,942 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:19,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-23 17:33:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:20,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:33:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:22,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:22,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:22,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804737642] [2021-11-23 17:33:22,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804737642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:22,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296465385] [2021-11-23 17:33:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:22,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:22,861 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:22,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2021-11-23 17:33:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:23,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:33:23,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:25,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:26,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [296465385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:26,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343457704] [2021-11-23 17:33:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:26,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:26,521 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:33:26,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-23 17:33:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:33:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:29,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343457704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:31,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:31,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 12, 10] total 45 [2021-11-23 17:33:31,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738927485] [2021-11-23 17:33:31,166 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:31,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 17:33:31,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 17:33:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 17:33:31,168 INFO L87 Difference]: Start difference. First operand 2907 states and 4162 transitions. Second operand has 45 states, 45 states have (on average 10.466666666666667) internal successors, (471), 45 states have internal predecessors, (471), 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 17:33:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:32,715 INFO L93 Difference]: Finished difference Result 3674 states and 5134 transitions. [2021-11-23 17:33:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 17:33:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 10.466666666666667) internal successors, (471), 45 states have internal predecessors, (471), 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 101 [2021-11-23 17:33:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:32,719 INFO L225 Difference]: With dead ends: 3674 [2021-11-23 17:33:32,719 INFO L226 Difference]: Without dead ends: 3220 [2021-11-23 17:33:32,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 562 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=315, Invalid=2877, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 17:33:32,721 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 4463 mSDsluCounter, 34539 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4463 SdHoareTripleChecker+Valid, 36107 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:32,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4463 Valid, 36107 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2021-11-23 17:33:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-23 17:33:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2824. [2021-11-23 17:33:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2822 states have (on average 1.4369241672572644) internal successors, (4055), 2823 states have internal predecessors, (4055), 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 17:33:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 4055 transitions. [2021-11-23 17:33:32,834 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 4055 transitions. Word has length 101 [2021-11-23 17:33:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:32,834 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 4055 transitions. [2021-11-23 17:33:32,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 10.466666666666667) internal successors, (471), 45 states have internal predecessors, (471), 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 17:33:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 4055 transitions. [2021-11-23 17:33:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:33:32,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:32,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:32,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:33,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:33,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-23 17:33:33,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:33,463 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1406582562, now seen corresponding path program 1 times [2021-11-23 17:33:33,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:33,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913543877] [2021-11-23 17:33:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:33,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:33,465 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:33,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-23 17:33:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:33:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:33:33,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:33:33,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:33,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913543877] [2021-11-23 17:33:33,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913543877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:33:33,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:33:33,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:33:33,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955503389] [2021-11-23 17:33:33,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:33:33,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:33:33,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:33:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:33:33,887 INFO L87 Difference]: Start difference. First operand 2824 states and 4055 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 17:34:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:10,322 INFO L93 Difference]: Finished difference Result 5830 states and 8742 transitions. [2021-11-23 17:34:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 101 [2021-11-23 17:34:10,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:10,327 INFO L225 Difference]: With dead ends: 5830 [2021-11-23 17:34:10,327 INFO L226 Difference]: Without dead ends: 4326 [2021-11-23 17:34:10,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 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 17:34:10,329 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 844 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:10,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 594 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 36.2s Time] [2021-11-23 17:34:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-11-23 17:34:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4326. [2021-11-23 17:34:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4324 states have (on average 1.3489824236817762) internal successors, (5833), 4325 states have internal predecessors, (5833), 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 17:34:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 5833 transitions. [2021-11-23 17:34:10,480 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 5833 transitions. Word has length 101 [2021-11-23 17:34:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:10,480 INFO L470 AbstractCegarLoop]: Abstraction has 4326 states and 5833 transitions. [2021-11-23 17:34:10,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 17:34:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 5833 transitions. [2021-11-23 17:34:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:34:10,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:10,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:10,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:10,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:10,683 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash 148072272, now seen corresponding path program 1 times [2021-11-23 17:34:10,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:10,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388391318] [2021-11-23 17:34:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:10,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:10,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:10,685 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:10,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-23 17:34:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:10,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:34:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:13,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:13,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:13,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388391318] [2021-11-23 17:34:13,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388391318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:13,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [751781917] [2021-11-23 17:34:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:13,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:13,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:13,794 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:13,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-11-23 17:34:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:13,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:34:13,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:59,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:10,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [751781917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:10,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224631938] [2021-11-23 17:35:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:10,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:10,056 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:10,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-23 17:35:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:10,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:35:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:12,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:12,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224631938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:12,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:12,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 41, 33, 10, 9] total 85 [2021-11-23 17:35:12,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926491583] [2021-11-23 17:35:12,624 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:12,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-23 17:35:12,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-23 17:35:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=6217, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 17:35:12,625 INFO L87 Difference]: Start difference. First operand 4326 states and 5833 transitions. Second operand has 85 states, 85 states have (on average 3.9529411764705884) internal successors, (336), 85 states have internal predecessors, (336), 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 17:35:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:16,020 INFO L93 Difference]: Finished difference Result 5120 states and 6825 transitions. [2021-11-23 17:35:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 17:35:16,021 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.9529411764705884) internal successors, (336), 85 states have internal predecessors, (336), 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 102 [2021-11-23 17:35:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:16,024 INFO L225 Difference]: With dead ends: 5120 [2021-11-23 17:35:16,024 INFO L226 Difference]: Without dead ends: 4804 [2021-11-23 17:35:16,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2863 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=1006, Invalid=6476, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 17:35:16,025 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 20623 mSDsluCounter, 30892 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20623 SdHoareTripleChecker+Valid, 32479 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:16,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20623 Valid, 32479 Invalid, 1302 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 740 Invalid, 0 Unknown, 537 Unchecked, 1.7s Time] [2021-11-23 17:35:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2021-11-23 17:35:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4327. [2021-11-23 17:35:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4325 states have (on average 1.3489017341040463) internal successors, (5834), 4326 states have internal predecessors, (5834), 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 17:35:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5834 transitions. [2021-11-23 17:35:16,153 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5834 transitions. Word has length 102 [2021-11-23 17:35:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:16,154 INFO L470 AbstractCegarLoop]: Abstraction has 4327 states and 5834 transitions. [2021-11-23 17:35:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.9529411764705884) internal successors, (336), 85 states have internal predecessors, (336), 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 17:35:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5834 transitions. [2021-11-23 17:35:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:35:16,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:16,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:16,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:16,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2021-11-23 17:35:16,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-11-23 17:35:16,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:16,783 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash 631952940, now seen corresponding path program 1 times [2021-11-23 17:35:16,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:16,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977586977] [2021-11-23 17:35:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:16,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:16,785 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:16,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-23 17:35:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:35:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:35:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:35:17,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:17,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977586977] [2021-11-23 17:35:17,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977586977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:17,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [290718427] [2021-11-23 17:35:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:17,694 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:17,695 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:17,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2021-11-23 17:35:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:35:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:35:17,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:17,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [290718427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:17,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:35:17,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2021-11-23 17:35:17,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966553212] [2021-11-23 17:35:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:17,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:35:17,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:35:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:35:17,931 INFO L87 Difference]: Start difference. First operand 4327 states and 5834 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:35:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:18,064 INFO L93 Difference]: Finished difference Result 5374 states and 7212 transitions. [2021-11-23 17:35:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:35:18,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 102 [2021-11-23 17:35:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:18,077 INFO L225 Difference]: With dead ends: 5374 [2021-11-23 17:35:18,077 INFO L226 Difference]: Without dead ends: 4356 [2021-11-23 17:35:18,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:35:18,080 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 1509 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:18,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1509 Valid, 1631 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:35:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-11-23 17:35:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 4226. [2021-11-23 17:35:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4226 states, 4224 states have (on average 1.3494318181818181) internal successors, (5700), 4225 states have internal predecessors, (5700), 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 17:35:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4226 states to 4226 states and 5700 transitions. [2021-11-23 17:35:18,261 INFO L78 Accepts]: Start accepts. Automaton has 4226 states and 5700 transitions. Word has length 102 [2021-11-23 17:35:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:18,262 INFO L470 AbstractCegarLoop]: Abstraction has 4226 states and 5700 transitions. [2021-11-23 17:35:18,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:35:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4226 states and 5700 transitions. [2021-11-23 17:35:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:35:18,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:18,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:18,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:18,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2021-11-23 17:35:18,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:18,665 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2042048041, now seen corresponding path program 1 times [2021-11-23 17:35:18,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:18,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390453632] [2021-11-23 17:35:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:18,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:18,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:18,667 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:18,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-23 17:35:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:35:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:21,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:21,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390453632] [2021-11-23 17:35:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390453632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [271365510] [2021-11-23 17:35:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:21,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:21,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:21,597 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:21,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2021-11-23 17:35:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:21,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:35:21,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:28,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:30,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [271365510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535459094] [2021-11-23 17:35:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:30,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:30,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:30,042 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:30,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-23 17:35:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:35:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:32,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:32,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535459094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:32,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:32,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 19, 16, 10, 9] total 46 [2021-11-23 17:35:32,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894401983] [2021-11-23 17:35:32,723 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:32,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 17:35:32,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:32,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 17:35:32,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 17:35:32,725 INFO L87 Difference]: Start difference. First operand 4226 states and 5700 transitions. Second operand has 46 states, 46 states have (on average 6.978260869565218) internal successors, (321), 46 states have internal predecessors, (321), 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 17:35:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:33,555 INFO L93 Difference]: Finished difference Result 4612 states and 6220 transitions. [2021-11-23 17:35:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 17:35:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.978260869565218) internal successors, (321), 46 states have internal predecessors, (321), 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 102 [2021-11-23 17:35:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:33,564 INFO L225 Difference]: With dead ends: 4612 [2021-11-23 17:35:33,564 INFO L226 Difference]: Without dead ends: 4301 [2021-11-23 17:35:33,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:35:33,567 INFO L933 BasicCegarLoop]: 1543 mSDtfsCounter, 10252 mSDsluCounter, 18731 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10252 SdHoareTripleChecker+Valid, 20274 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:33,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10252 Valid, 20274 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 214 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2021-11-23 17:35:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-11-23 17:35:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 4221. [2021-11-23 17:35:33,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4219 states have (on average 1.3496089120644703) internal successors, (5694), 4220 states have internal predecessors, (5694), 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 17:35:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 5694 transitions. [2021-11-23 17:35:33,737 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 5694 transitions. Word has length 102 [2021-11-23 17:35:33,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:33,737 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 5694 transitions. [2021-11-23 17:35:33,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.978260869565218) internal successors, (321), 46 states have internal predecessors, (321), 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 17:35:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 5694 transitions. [2021-11-23 17:35:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:35:33,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:33,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:33,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:33,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2021-11-23 17:35:34,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2021-11-23 17:35:34,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:34,339 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 399970679, now seen corresponding path program 1 times [2021-11-23 17:35:34,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:34,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954037426] [2021-11-23 17:35:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:34,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:34,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:34,341 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:34,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-23 17:35:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:35:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:36,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:37,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:37,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954037426] [2021-11-23 17:35:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954037426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314975650] [2021-11-23 17:35:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:37,304 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:37,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:37,305 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:37,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2021-11-23 17:35:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:35:37,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:39,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:40,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314975650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:40,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143134737] [2021-11-23 17:35:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:40,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:40,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:40,098 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:40,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-23 17:35:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:35:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:42,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:44,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143134737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:44,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:44,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 12, 10] total 30 [2021-11-23 17:35:44,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831826354] [2021-11-23 17:35:44,348 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:44,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:35:44,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:35:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:35:44,350 INFO L87 Difference]: Start difference. First operand 4221 states and 5694 transitions. Second operand has 30 states, 30 states have (on average 10.3) internal successors, (309), 30 states have internal predecessors, (309), 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 17:35:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:44,718 INFO L93 Difference]: Finished difference Result 4544 states and 6124 transitions. [2021-11-23 17:35:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:35:44,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 10.3) internal successors, (309), 30 states have internal predecessors, (309), 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 102 [2021-11-23 17:35:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:44,724 INFO L225 Difference]: With dead ends: 4544 [2021-11-23 17:35:44,725 INFO L226 Difference]: Without dead ends: 4233 [2021-11-23 17:35:44,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 577 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:35:44,727 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 2997 mSDsluCounter, 18876 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2997 SdHoareTripleChecker+Valid, 20420 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:44,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2997 Valid, 20420 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 185 Unchecked, 0.1s Time] [2021-11-23 17:35:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2021-11-23 17:35:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 4221. [2021-11-23 17:35:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4219 states have (on average 1.3496089120644703) internal successors, (5694), 4220 states have internal predecessors, (5694), 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 17:35:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 5694 transitions. [2021-11-23 17:35:44,890 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 5694 transitions. Word has length 102 [2021-11-23 17:35:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:44,891 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 5694 transitions. [2021-11-23 17:35:44,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.3) internal successors, (309), 30 states have internal predecessors, (309), 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 17:35:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 5694 transitions. [2021-11-23 17:35:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:35:44,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:44,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:44,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:45,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-23 17:35:45,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:45,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:45,493 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:45,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:45,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1009959526, now seen corresponding path program 1 times [2021-11-23 17:35:45,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:45,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037450551] [2021-11-23 17:35:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:45,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:45,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:45,495 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:45,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-23 17:35:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:35:45,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:50,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:51,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:51,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037450551] [2021-11-23 17:35:51,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037450551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:51,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2015803796] [2021-11-23 17:35:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:51,779 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:51,780 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:51,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2021-11-23 17:35:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:51,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:35:51,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:54,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:55,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2015803796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:55,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54955658] [2021-11-23 17:35:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:55,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:55,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:55,742 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:55,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-23 17:35:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:55,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:35:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:05,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:09,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54955658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:09,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:09,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11, 9, 24, 21] total 80 [2021-11-23 17:36:09,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799713551] [2021-11-23 17:36:09,695 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:09,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:36:09,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:36:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=5419, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:36:09,697 INFO L87 Difference]: Start difference. First operand 4221 states and 5694 transitions. Second operand has 80 states, 80 states have (on average 6.0) internal successors, (480), 80 states have internal predecessors, (480), 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 17:36:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:10,553 INFO L93 Difference]: Finished difference Result 4478 states and 6037 transitions. [2021-11-23 17:36:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:36:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 6.0) internal successors, (480), 80 states have internal predecessors, (480), 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 102 [2021-11-23 17:36:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:10,557 INFO L225 Difference]: With dead ends: 4478 [2021-11-23 17:36:10,557 INFO L226 Difference]: Without dead ends: 4111 [2021-11-23 17:36:10,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=932, Invalid=5548, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 17:36:10,559 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 7463 mSDsluCounter, 37002 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7463 SdHoareTripleChecker+Valid, 38540 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:10,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7463 Valid, 38540 Invalid, 499 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 223 Invalid, 0 Unknown, 267 Unchecked, 0.4s Time] [2021-11-23 17:36:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-11-23 17:36:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4099. [2021-11-23 17:36:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4099 states, 4097 states have (on average 1.3509885281913596) internal successors, (5535), 4098 states have internal predecessors, (5535), 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 17:36:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 5535 transitions. [2021-11-23 17:36:10,684 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 5535 transitions. Word has length 102 [2021-11-23 17:36:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:10,685 INFO L470 AbstractCegarLoop]: Abstraction has 4099 states and 5535 transitions. [2021-11-23 17:36:10,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 6.0) internal successors, (480), 80 states have internal predecessors, (480), 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 17:36:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 5535 transitions. [2021-11-23 17:36:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:36:10,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:10,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:10,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:10,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-23 17:36:11,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:11,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:11,287 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1857028088, now seen corresponding path program 1 times [2021-11-23 17:36:11,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:11,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135366971] [2021-11-23 17:36:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:11,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:11,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:11,288 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:11,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-23 17:36:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:36:11,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:15,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:16,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135366971] [2021-11-23 17:36:16,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135366971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [469170792] [2021-11-23 17:36:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:16,444 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:16,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:16,445 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:16,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2021-11-23 17:36:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:36:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:25,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [469170792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296818079] [2021-11-23 17:36:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:25,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:25,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:25,588 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:25,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-23 17:36:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:36:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:42,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:47,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296818079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:47,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:47,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 19, 15, 27, 22] total 96 [2021-11-23 17:36:47,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200327949] [2021-11-23 17:36:47,514 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:47,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-23 17:36:47,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-23 17:36:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=8160, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 17:36:47,516 INFO L87 Difference]: Start difference. First operand 4099 states and 5535 transitions. Second operand has 96 states, 96 states have (on average 4.989583333333333) internal successors, (479), 96 states have internal predecessors, (479), 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 17:36:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:49,771 INFO L93 Difference]: Finished difference Result 4829 states and 6434 transitions. [2021-11-23 17:36:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 17:36:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.989583333333333) internal successors, (479), 96 states have internal predecessors, (479), 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 103 [2021-11-23 17:36:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:49,776 INFO L225 Difference]: With dead ends: 4829 [2021-11-23 17:36:49,776 INFO L226 Difference]: Without dead ends: 4518 [2021-11-23 17:36:49,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4043 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1012, Invalid=8494, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 17:36:49,779 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 14889 mSDsluCounter, 38796 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14889 SdHoareTripleChecker+Valid, 40446 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:49,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14889 Valid, 40446 Invalid, 1554 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 666 Invalid, 0 Unknown, 873 Unchecked, 1.2s Time] [2021-11-23 17:36:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-11-23 17:36:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 4003. [2021-11-23 17:36:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4001 states have (on average 1.3519120219945013) internal successors, (5409), 4002 states have internal predecessors, (5409), 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 17:36:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 5409 transitions. [2021-11-23 17:36:49,900 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 5409 transitions. Word has length 103 [2021-11-23 17:36:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:49,901 INFO L470 AbstractCegarLoop]: Abstraction has 4003 states and 5409 transitions. [2021-11-23 17:36:49,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.989583333333333) internal successors, (479), 96 states have internal predecessors, (479), 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 17:36:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 5409 transitions. [2021-11-23 17:36:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 17:36:49,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:49,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:49,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:50,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-11-23 17:36:50,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2021-11-23 17:36:50,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:50,503 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:50,504 INFO L85 PathProgramCache]: Analyzing trace with hash -647171411, now seen corresponding path program 1 times [2021-11-23 17:36:50,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:50,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202629291] [2021-11-23 17:36:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:50,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:50,506 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:50,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60e6fbc7-504c-4a18-8c91-c7ca1ee48a18/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-23 17:36:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:50,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:50,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:50,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202629291] [2021-11-23 17:36:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202629291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:50,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:50,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:36:50,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066870715] [2021-11-23 17:36:50,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:50,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:50,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:50,969 INFO L87 Difference]: Start difference. First operand 4003 states and 5409 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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)