./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e62cc9109c388b2d044e23a78dff269f72cf5701 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e62cc9109c388b2d044e23a78dff269f72cf5701 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:09:54,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:09:54,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:09:54,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:09:54,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:09:54,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:09:54,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:09:54,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:09:54,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:09:54,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:09:54,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:09:54,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:09:54,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:09:54,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:09:54,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:09:54,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:09:54,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:09:54,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:09:54,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:09:54,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:09:54,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:09:54,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:09:54,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:09:54,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:09:54,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:09:54,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:09:54,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:09:54,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:09:54,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:09:54,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:09:54,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:09:54,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:09:54,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:09:54,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:09:54,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:09:54,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:09:54,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:09:54,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:09:54,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:09:54,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:09:54,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:09:54,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 03:09:54,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:09:54,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:09:54,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:09:54,716 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:09:54,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:09:54,717 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:09:54,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:09:54,717 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:09:54,717 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:09:54,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:09:54,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:09:54,718 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:09:54,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:09:54,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:09:54,719 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:09:54,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:09:54,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:09:54,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:09:54,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:09:54,721 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:09:54,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:09:54,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:09:54,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:09:54,722 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:09:54,722 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:09:54,722 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:09:54,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:09:54,723 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:09:54,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:09:54,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:09:54,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:09:54,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:09:54,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:54,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:09:54,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:09:54,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:09:54,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:09:54,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:09:54,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:09:54,726 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_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e62cc9109c388b2d044e23a78dff269f72cf5701 [2021-10-16 03:09:54,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:09:54,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:09:54,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:09:54,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:09:54,995 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:09:54,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-16 03:09:55,060 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/08c495c84/59e250bcfab746df93fa2ff94067e360/FLAGb27ffc324 [2021-10-16 03:09:55,599 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:09:55,600 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-16 03:09:55,611 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/08c495c84/59e250bcfab746df93fa2ff94067e360/FLAGb27ffc324 [2021-10-16 03:09:55,920 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/08c495c84/59e250bcfab746df93fa2ff94067e360 [2021-10-16 03:09:55,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:09:55,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:09:55,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:55,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:09:55,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:09:55,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:55" (1/1) ... [2021-10-16 03:09:55,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0b74cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:55, skipping insertion in model container [2021-10-16 03:09:55,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:55" (1/1) ... [2021-10-16 03:09:55,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:09:55,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:09:56,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:56,428 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:09:56,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:56,525 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:09:56,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56 WrapperNode [2021-10-16 03:09:56,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:56,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:56,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:09:56,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:09:56,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:56,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:09:56,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:09:56,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:09:56,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:09:56,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:09:56,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:09:56,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:09:56,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (1/1) ... [2021-10-16 03:09:56,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:56,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:09:56,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:09:56,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:09:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:09:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:09:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:09:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:09:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:09:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:09:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:09:56,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:09:57,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:09:57,169 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-16 03:09:57,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:57 BoogieIcfgContainer [2021-10-16 03:09:57,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:09:57,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:09:57,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:09:57,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:09:57,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:09:55" (1/3) ... [2021-10-16 03:09:57,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bec632c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:57, skipping insertion in model container [2021-10-16 03:09:57,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:56" (2/3) ... [2021-10-16 03:09:57,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bec632c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:57, skipping insertion in model container [2021-10-16 03:09:57,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:57" (3/3) ... [2021-10-16 03:09:57,196 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2021-10-16 03:09:57,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:09:57,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-10-16 03:09:57,291 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:09:57,299 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 03:09:57,299 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-16 03:09:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 03:09:57,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:57,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 03:09:57,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash 3879, now seen corresponding path program 1 times [2021-10-16 03:09:57,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:57,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104935131] [2021-10-16 03:09:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:57,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:57,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:57,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104935131] [2021-10-16 03:09:57,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104935131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:57,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:57,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 03:09:57,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852602919] [2021-10-16 03:09:57,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:09:57,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:57,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:09:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:09:57,515 INFO L87 Difference]: Start difference. First operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:57,613 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-10-16 03:09:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:09:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-16 03:09:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:57,625 INFO L225 Difference]: With dead ends: 54 [2021-10-16 03:09:57,625 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 03:09:57,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:09:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 03:09:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-10-16 03:09:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-10-16 03:09:57,663 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 2 [2021-10-16 03:09:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:57,664 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-10-16 03:09:57,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-10-16 03:09:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 03:09:57,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:57,665 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 03:09:57,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:09:57,665 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash 3880, now seen corresponding path program 1 times [2021-10-16 03:09:57,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:57,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680643697] [2021-10-16 03:09:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:57,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:57,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:57,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680643697] [2021-10-16 03:09:57,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680643697] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:57,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:57,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 03:09:57,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200284219] [2021-10-16 03:09:57,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:09:57,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:09:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:09:57,720 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:57,778 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-16 03:09:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:09:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-16 03:09:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:57,779 INFO L225 Difference]: With dead ends: 48 [2021-10-16 03:09:57,779 INFO L226 Difference]: Without dead ends: 48 [2021-10-16 03:09:57,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:09:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-16 03:09:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-10-16 03:09:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-16 03:09:57,786 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 2 [2021-10-16 03:09:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:57,786 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-16 03:09:57,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-16 03:09:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:09:57,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:57,787 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:57,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:09:57,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1730509016, now seen corresponding path program 1 times [2021-10-16 03:09:57,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:57,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397313417] [2021-10-16 03:09:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:57,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:57,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:57,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397313417] [2021-10-16 03:09:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397313417] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:57,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:57,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:09:57,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721190808] [2021-10-16 03:09:57,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:57,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:57,871 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:57,955 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-10-16 03:09:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 03:09:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:57,957 INFO L225 Difference]: With dead ends: 69 [2021-10-16 03:09:57,957 INFO L226 Difference]: Without dead ends: 69 [2021-10-16 03:09:57,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:09:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-16 03:09:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-10-16 03:09:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-16 03:09:57,963 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2021-10-16 03:09:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:57,964 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-16 03:09:57,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-16 03:09:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:09:57,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:57,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:57,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:09:57,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1730507620, now seen corresponding path program 1 times [2021-10-16 03:09:57,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:57,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648548457] [2021-10-16 03:09:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:57,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:58,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:58,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648548457] [2021-10-16 03:09:58,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648548457] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:58,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:58,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:09:58,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819988763] [2021-10-16 03:09:58,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:58,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:58,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:58,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:58,023 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:58,098 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-10-16 03:09:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:58,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 03:09:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:58,100 INFO L225 Difference]: With dead ends: 48 [2021-10-16 03:09:58,100 INFO L226 Difference]: Without dead ends: 48 [2021-10-16 03:09:58,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:09:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-16 03:09:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-10-16 03:09:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.7) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-10-16 03:09:58,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 8 [2021-10-16 03:09:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:58,105 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-10-16 03:09:58,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-10-16 03:09:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:09:58,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:58,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:58,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 03:09:58,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:58,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1730507621, now seen corresponding path program 1 times [2021-10-16 03:09:58,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:58,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530196059] [2021-10-16 03:09:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:58,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:58,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:58,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530196059] [2021-10-16 03:09:58,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530196059] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:58,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:58,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:09:58,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379719398] [2021-10-16 03:09:58,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:58,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:58,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:58,177 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:58,281 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-16 03:09:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 03:09:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:58,283 INFO L225 Difference]: With dead ends: 74 [2021-10-16 03:09:58,283 INFO L226 Difference]: Without dead ends: 74 [2021-10-16 03:09:58,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:09:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-16 03:09:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2021-10-16 03:09:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-10-16 03:09:58,289 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 8 [2021-10-16 03:09:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:58,289 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-10-16 03:09:58,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-10-16 03:09:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:09:58,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:58,291 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:58,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 03:09:58,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:58,292 INFO L82 PathProgramCache]: Analyzing trace with hash 866437451, now seen corresponding path program 1 times [2021-10-16 03:09:58,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:58,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980608970] [2021-10-16 03:09:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:58,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:58,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:58,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980608970] [2021-10-16 03:09:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980608970] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:58,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:09:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739263056] [2021-10-16 03:09:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:58,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:58,445 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:58,501 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-10-16 03:09:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:09:58,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 03:09:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:58,502 INFO L225 Difference]: With dead ends: 58 [2021-10-16 03:09:58,503 INFO L226 Difference]: Without dead ends: 58 [2021-10-16 03:09:58,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-16 03:09:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-16 03:09:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-10-16 03:09:58,508 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2021-10-16 03:09:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:58,508 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-10-16 03:09:58,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-10-16 03:09:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:09:58,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:58,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:58,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 03:09:58,510 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1463010864, now seen corresponding path program 1 times [2021-10-16 03:09:58,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:58,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177386699] [2021-10-16 03:09:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:58,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:58,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:58,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177386699] [2021-10-16 03:09:58,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177386699] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:58,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:58,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 03:09:58,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368645361] [2021-10-16 03:09:58,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:09:58,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:09:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:09:58,634 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:58,785 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-10-16 03:09:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:09:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 03:09:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:58,786 INFO L225 Difference]: With dead ends: 63 [2021-10-16 03:09:58,786 INFO L226 Difference]: Without dead ends: 63 [2021-10-16 03:09:58,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:09:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-16 03:09:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2021-10-16 03:09:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.525) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-10-16 03:09:58,791 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2021-10-16 03:09:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:58,791 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-10-16 03:09:58,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-10-16 03:09:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:09:58,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:58,792 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:58,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 03:09:58,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1462999879, now seen corresponding path program 1 times [2021-10-16 03:09:58,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:58,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084538413] [2021-10-16 03:09:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:58,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:58,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:58,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084538413] [2021-10-16 03:09:58,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084538413] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:58,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:58,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:09:58,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391848335] [2021-10-16 03:09:58,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:58,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:58,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:58,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:58,840 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:58,929 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-16 03:09:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:58,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 03:09:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:58,931 INFO L225 Difference]: With dead ends: 69 [2021-10-16 03:09:58,931 INFO L226 Difference]: Without dead ends: 69 [2021-10-16 03:09:58,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:09:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-16 03:09:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-10-16 03:09:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 61 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2021-10-16 03:09:58,936 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 12 [2021-10-16 03:09:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:58,936 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2021-10-16 03:09:58,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2021-10-16 03:09:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 03:09:58,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:58,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:58,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 03:09:58,938 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:09:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1098836238, now seen corresponding path program 1 times [2021-10-16 03:09:58,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:58,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438074109] [2021-10-16 03:09:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:58,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:59,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:59,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438074109] [2021-10-16 03:09:59,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438074109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:09:59,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217096446] [2021-10-16 03:09:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:59,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:09:59,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:09:59,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:09:59,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:09:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:59,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:09:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:09:59,182 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-10-16 03:09:59,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-10-16 03:10:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:00,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:01,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217096446] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:01,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515668776] [2021-10-16 03:10:01,041 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-16 03:10:01,041 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:10:01,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:10:01,055 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:10:01,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:10:01,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:01,105 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:10:01,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:01,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:10:01,107 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:10:01,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:01,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 03:10:01,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-16 03:10:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:01,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:01,157 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 03:10:01,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 03:10:01,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:01,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:10:01,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:01,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:10:01,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:10:01,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:10:01,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:01,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:01,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-10-16 03:10:01,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:10:01,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:104 [2021-10-16 03:10:01,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:01,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-16 03:10:01,420 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_44| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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) [2021-10-16 03:10:01,424 INFO L168 Benchmark]: Toolchain (without parser) took 5498.55 ms. Allocated memory was 130.0 MB in the beginning and 163.6 MB in the end (delta: 33.6 MB). Free memory was 96.8 MB in the beginning and 104.7 MB in the end (delta: -7.9 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:10:01,424 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory is still 39.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:10:01,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 599.00 ms. Allocated memory is still 130.0 MB. Free memory was 96.5 MB in the beginning and 101.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:10:01,425 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.56 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 99.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:10:01,426 INFO L168 Benchmark]: Boogie Preprocessor took 36.13 ms. Allocated memory is still 130.0 MB. Free memory was 99.1 MB in the beginning and 97.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:10:01,426 INFO L168 Benchmark]: RCFGBuilder took 527.97 ms. Allocated memory is still 130.0 MB. Free memory was 97.4 MB in the beginning and 81.0 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:10:01,427 INFO L168 Benchmark]: TraceAbstraction took 4248.93 ms. Allocated memory was 130.0 MB in the beginning and 163.6 MB in the end (delta: 33.6 MB). Free memory was 80.6 MB in the beginning and 104.7 MB in the end (delta: -24.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:10:01,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory is still 39.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 599.00 ms. Allocated memory is still 130.0 MB. Free memory was 96.5 MB in the beginning and 101.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.56 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 99.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.13 ms. Allocated memory is still 130.0 MB. Free memory was 99.1 MB in the beginning and 97.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 527.97 ms. Allocated memory is still 130.0 MB. Free memory was 97.4 MB in the beginning and 81.0 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4248.93 ms. Allocated memory was 130.0 MB in the beginning and 163.6 MB in the end (delta: 33.6 MB). Free memory was 80.6 MB in the beginning and 104.7 MB in the end (delta: -24.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_44| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_44|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 03:10:01,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:10:03,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:10:03,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:10:03,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:10:03,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:10:03,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:10:03,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:10:03,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:10:03,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:10:03,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:10:03,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:10:03,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:10:03,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:10:03,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:10:03,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:10:03,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:10:03,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:10:03,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:10:03,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:10:03,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:10:03,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:10:03,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:10:03,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:10:03,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:10:03,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:10:03,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:10:03,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:10:03,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:10:03,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:10:03,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:10:03,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:10:03,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:10:03,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:10:03,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:10:04,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:10:04,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:10:04,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:10:04,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:10:04,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:10:04,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:10:04,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:10:04,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 03:10:04,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:10:04,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:10:04,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:10:04,059 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:10:04,059 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:10:04,060 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:10:04,060 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:10:04,060 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:10:04,060 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:10:04,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:10:04,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:10:04,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:10:04,064 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:10:04,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:10:04,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:10:04,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:10:04,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:10:04,065 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:10:04,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:10:04,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:10:04,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:10:04,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:10:04,066 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:10:04,066 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:10:04,066 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:10:04,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:10:04,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:10:04,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:10:04,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:10:04,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:10:04,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:10:04,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:10:04,068 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:10:04,069 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:10:04,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:10:04,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:10:04,069 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_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e62cc9109c388b2d044e23a78dff269f72cf5701 [2021-10-16 03:10:04,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:10:04,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:10:04,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:10:04,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:10:04,484 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:10:04,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-16 03:10:04,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/4083c3f2a/b7ff0f22fdc24baca783b8ba6a59678d/FLAG42c706499 [2021-10-16 03:10:05,135 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:10:05,135 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-16 03:10:05,161 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/4083c3f2a/b7ff0f22fdc24baca783b8ba6a59678d/FLAG42c706499 [2021-10-16 03:10:05,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/data/4083c3f2a/b7ff0f22fdc24baca783b8ba6a59678d [2021-10-16 03:10:05,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:10:05,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:10:05,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:10:05,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:10:05,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:10:05,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:10:05" (1/1) ... [2021-10-16 03:10:05,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1146edd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:05, skipping insertion in model container [2021-10-16 03:10:05,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:10:05" (1/1) ... [2021-10-16 03:10:05,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:10:05,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:10:05,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:10:06,006 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:10:06,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:10:06,111 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:10:06,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06 WrapperNode [2021-10-16 03:10:06,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:10:06,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:10:06,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:10:06,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:10:06,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:10:06,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:10:06,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:10:06,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:10:06,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:10:06,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:10:06,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:10:06,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:10:06,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (1/1) ... [2021-10-16 03:10:06,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:10:06,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:10:06,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:10:06,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:10:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:10:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:10:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:10:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:10:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:10:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:10:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:10:06,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:10:06,847 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:10:06,847 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-16 03:10:06,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:10:06 BoogieIcfgContainer [2021-10-16 03:10:06,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:10:06,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:10:06,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:10:06,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:10:06,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:10:05" (1/3) ... [2021-10-16 03:10:06,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d1cc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:10:06, skipping insertion in model container [2021-10-16 03:10:06,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:10:06" (2/3) ... [2021-10-16 03:10:06,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d1cc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:10:06, skipping insertion in model container [2021-10-16 03:10:06,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:10:06" (3/3) ... [2021-10-16 03:10:06,858 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2021-10-16 03:10:06,863 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:10:06,863 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-10-16 03:10:06,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:10:06,915 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 03:10:06,915 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-16 03:10:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 03:10:06,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:06,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 03:10:06,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:06,942 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-16 03:10:06,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:06,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887741440] [2021-10-16 03:10:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:06,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:06,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:06,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:06,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:10:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:07,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:10:07,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:07,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:07,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:07,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:07,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887741440] [2021-10-16 03:10:07,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887741440] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:07,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:07,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:10:07,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281975762] [2021-10-16 03:10:07,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:10:07,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:10:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:10:07,293 INFO L87 Difference]: Start difference. First operand has 57 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 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, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:07,510 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-10-16 03:10:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:10:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-16 03:10:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:07,520 INFO L225 Difference]: With dead ends: 61 [2021-10-16 03:10:07,520 INFO L226 Difference]: Without dead ends: 57 [2021-10-16 03:10:07,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:10:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-16 03:10:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-10-16 03:10:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-10-16 03:10:07,555 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 3 [2021-10-16 03:10:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:07,555 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-10-16 03:10:07,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-10-16 03:10:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 03:10:07,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:07,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 03:10:07,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:07,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:07,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-16 03:10:07,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:07,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114980411] [2021-10-16 03:10:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:07,775 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:07,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:07,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:07,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:10:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:10:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:07,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:08,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:08,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114980411] [2021-10-16 03:10:08,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114980411] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:08,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:08,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 03:10:08,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128277547] [2021-10-16 03:10:08,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:10:08,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:10:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:10:08,035 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:08,295 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-10-16 03:10:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:10:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 3 [2021-10-16 03:10:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:08,297 INFO L225 Difference]: With dead ends: 52 [2021-10-16 03:10:08,297 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 03:10:08,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:10:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 03:10:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-10-16 03:10:08,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-16 03:10:08,305 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 3 [2021-10-16 03:10:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:08,305 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-16 03:10:08,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-16 03:10:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:10:08,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:08,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:08,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:08,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:08,518 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:08,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1837114924, now seen corresponding path program 1 times [2021-10-16 03:10:08,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:08,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828563956] [2021-10-16 03:10:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:08,521 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:08,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:08,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:08,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:10:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:08,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:10:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:08,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:08,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:08,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:08,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828563956] [2021-10-16 03:10:08,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828563956] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:08,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:08,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 03:10:08,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030151794] [2021-10-16 03:10:08,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:10:08,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:10:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:10:08,743 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:08,961 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-10-16 03:10:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:10:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 03:10:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:08,963 INFO L225 Difference]: With dead ends: 56 [2021-10-16 03:10:08,963 INFO L226 Difference]: Without dead ends: 56 [2021-10-16 03:10:08,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:10:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-16 03:10:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-10-16 03:10:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-10-16 03:10:08,969 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 9 [2021-10-16 03:10:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:08,970 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-10-16 03:10:08,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-10-16 03:10:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:10:08,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:08,971 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:08,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:09,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:09,186 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:09,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1837114925, now seen corresponding path program 1 times [2021-10-16 03:10:09,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:09,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448183538] [2021-10-16 03:10:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:09,188 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:09,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:09,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:09,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:10:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:10:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:09,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:09,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:09,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:09,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448183538] [2021-10-16 03:10:09,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448183538] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:09,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:09,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 03:10:09,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384250998] [2021-10-16 03:10:09,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:10:09,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:10:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:10:09,573 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:09,974 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2021-10-16 03:10:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:10:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 03:10:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:09,977 INFO L225 Difference]: With dead ends: 83 [2021-10-16 03:10:09,977 INFO L226 Difference]: Without dead ends: 83 [2021-10-16 03:10:09,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:10:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-16 03:10:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-16 03:10:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.56) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-10-16 03:10:09,984 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2021-10-16 03:10:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:09,985 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-10-16 03:10:09,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-10-16 03:10:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:10:09,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:09,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:10,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:10,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:10,202 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1115986890, now seen corresponding path program 1 times [2021-10-16 03:10:10,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:10,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667078794] [2021-10-16 03:10:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:10,203 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:10,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:10,204 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:10,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 03:10:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:10:10,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:10,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:10,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:10,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667078794] [2021-10-16 03:10:10,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667078794] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:10,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:10,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:10:10,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813028239] [2021-10-16 03:10:10,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:10:10,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:10,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:10:10,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:10:10,435 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:10,611 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2021-10-16 03:10:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:10:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 03:10:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:10,613 INFO L225 Difference]: With dead ends: 87 [2021-10-16 03:10:10,613 INFO L226 Difference]: Without dead ends: 87 [2021-10-16 03:10:10,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:10:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-16 03:10:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2021-10-16 03:10:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.52) internal successors, (76), 63 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) [2021-10-16 03:10:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-10-16 03:10:10,620 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 10 [2021-10-16 03:10:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:10,621 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-10-16 03:10:10,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-10-16 03:10:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:10:10,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:10,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:10,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:10,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:10,834 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:10,835 INFO L82 PathProgramCache]: Analyzing trace with hash 236809714, now seen corresponding path program 1 times [2021-10-16 03:10:10,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:10,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771662746] [2021-10-16 03:10:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:10,836 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:10,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:10,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:10,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 03:10:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:10:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:11,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:11,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:11,101 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:10:11,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 03:10:11,110 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 03:10:11,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-16 03:10:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:11,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:13,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:13,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771662746] [2021-10-16 03:10:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771662746] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:13,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:13,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 03:10:13,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604219881] [2021-10-16 03:10:13,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:10:13,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:13,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:10:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-16 03:10:13,536 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:20,288 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-16 03:10:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:10:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 03:10:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:20,290 INFO L225 Difference]: With dead ends: 64 [2021-10-16 03:10:20,290 INFO L226 Difference]: Without dead ends: 64 [2021-10-16 03:10:20,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8274.5ms TimeCoverageRelationStatistics Valid=24, Invalid=30, Unknown=2, NotChecked=0, Total=56 [2021-10-16 03:10:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-16 03:10:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-10-16 03:10:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.48) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-10-16 03:10:20,299 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2021-10-16 03:10:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:20,300 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-10-16 03:10:20,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-10-16 03:10:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:10:20,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:20,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:20,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:20,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:20,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:20,516 INFO L82 PathProgramCache]: Analyzing trace with hash 657991070, now seen corresponding path program 1 times [2021-10-16 03:10:20,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:20,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416349618] [2021-10-16 03:10:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:20,517 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:20,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:20,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:20,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 03:10:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 03:10:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:20,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:21,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:21,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416349618] [2021-10-16 03:10:21,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416349618] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:21,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:21,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-16 03:10:21,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515166176] [2021-10-16 03:10:21,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:10:21,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:10:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:10:21,013 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:21,453 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-10-16 03:10:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:10:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 03:10:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:21,455 INFO L225 Difference]: With dead ends: 83 [2021-10-16 03:10:21,455 INFO L226 Difference]: Without dead ends: 83 [2021-10-16 03:10:21,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-16 03:10:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-10-16 03:10:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 70 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) [2021-10-16 03:10:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2021-10-16 03:10:21,463 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 14 [2021-10-16 03:10:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:21,464 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2021-10-16 03:10:21,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2021-10-16 03:10:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:10:21,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:21,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:21,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:21,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:21,687 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:21,687 INFO L82 PathProgramCache]: Analyzing trace with hash 657980085, now seen corresponding path program 1 times [2021-10-16 03:10:21,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:21,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951442761] [2021-10-16 03:10:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:21,688 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:21,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:21,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:21,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 03:10:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:10:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:10:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-16 03:10:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 03:10:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-10-16 03:10:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:22,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:22,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951442761] [2021-10-16 03:10:22,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951442761] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:22,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:22,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-16 03:10:22,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127524004] [2021-10-16 03:10:22,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 03:10:22,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 03:10:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:10:22,427 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:22,993 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-10-16 03:10:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:10:22,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 03:10:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:22,996 INFO L225 Difference]: With dead ends: 76 [2021-10-16 03:10:22,996 INFO L226 Difference]: Without dead ends: 76 [2021-10-16 03:10:22,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-16 03:10:23,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-10-16 03:10:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-10-16 03:10:23,012 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 14 [2021-10-16 03:10:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:23,013 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-10-16 03:10:23,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-10-16 03:10:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 03:10:23,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:23,014 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:23,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:23,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:23,216 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash -675555265, now seen corresponding path program 1 times [2021-10-16 03:10:23,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:23,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964637234] [2021-10-16 03:10:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:23,217 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:23,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:23,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 03:10:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:23,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:10:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:23,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:23,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-16 03:10:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:23,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:23,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964637234] [2021-10-16 03:10:23,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964637234] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:23,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:23,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 03:10:23,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076364652] [2021-10-16 03:10:23,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:10:23,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:10:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:10:23,870 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:24,294 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-10-16 03:10:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:10:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 16 [2021-10-16 03:10:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:24,295 INFO L225 Difference]: With dead ends: 75 [2021-10-16 03:10:24,295 INFO L226 Difference]: Without dead ends: 75 [2021-10-16 03:10:24,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:10:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-16 03:10:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2021-10-16 03:10:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.411764705882353) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-16 03:10:24,300 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 16 [2021-10-16 03:10:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:24,300 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-16 03:10:24,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-16 03:10:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 03:10:24,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:24,301 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:24,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:24,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:24,502 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash -18664237, now seen corresponding path program 1 times [2021-10-16 03:10:24,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:24,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311615227] [2021-10-16 03:10:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:24,503 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:24,504 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:24,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 03:10:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:24,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:10:24,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:24,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:24,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:24,729 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-16 03:10:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:10:24,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:10:24,873 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-10-16 03:10:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-10-16 03:10:24,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:24,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:24,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:10:25,240 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-16 03:10:25,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 47 [2021-10-16 03:10:25,254 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 03:10:25,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 16 [2021-10-16 03:10:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:25,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:25,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:25,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311615227] [2021-10-16 03:10:25,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311615227] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:25,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793286387] [2021-10-16 03:10:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:25,630 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:10:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:10:25,635 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:10:25,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 03:10:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:10:25,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:25,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:25,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:10:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:10:26,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:26,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-10-16 03:10:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:26,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:10:26,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:26,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-10-16 03:10:26,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:26,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 16 [2021-10-16 03:10:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:26,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:26,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793286387] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:26,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094384641] [2021-10-16 03:10:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:26,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:10:26,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:10:26,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:10:26,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 03:10:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:10:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:27,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:27,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:27,103 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-16 03:10:27,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:10:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:27,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 03:10:27,198 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-10-16 03:10:27,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:10:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:27,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:27,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-10-16 03:10:27,426 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-16 03:10:27,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 47 [2021-10-16 03:10:27,445 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 03:10:27,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 16 [2021-10-16 03:10:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:27,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:27,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094384641] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:27,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:10:27,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 9, 6, 8, 6] total 14 [2021-10-16 03:10:27,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921655006] [2021-10-16 03:10:27,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:10:27,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:27,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:10:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-16 03:10:27,698 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:28,594 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-10-16 03:10:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 03:10:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 03:10:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:28,595 INFO L225 Difference]: With dead ends: 76 [2021-10-16 03:10:28,595 INFO L226 Difference]: Without dead ends: 76 [2021-10-16 03:10:28,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 944.4ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:10:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-16 03:10:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-10-16 03:10:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.360655737704918) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-10-16 03:10:28,600 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 17 [2021-10-16 03:10:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:28,600 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-10-16 03:10:28,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-10-16 03:10:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 03:10:28,602 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:28,602 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:28,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:28,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:29,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:29,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:10:29,212 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash -578592253, now seen corresponding path program 1 times [2021-10-16 03:10:29,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:29,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834259372] [2021-10-16 03:10:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:29,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:29,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:29,214 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:29,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 03:10:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:10:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:29,481 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-16 03:10:29,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-16 03:10:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:32,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:32,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:32,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834259372] [2021-10-16 03:10:32,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834259372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:32,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130973422] [2021-10-16 03:10:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:32,543 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:10:32,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:10:32,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:10:32,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 03:10:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:10:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:33,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:33,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130973422] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:33,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800693417] [2021-10-16 03:10:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:33,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:10:33,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:10:33,362 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:10:33,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 03:10:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:10:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:33,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:33,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800693417] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:33,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:10:33,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2021-10-16 03:10:33,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800864389] [2021-10-16 03:10:33,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:10:33,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:10:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:10:33,979 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:35,063 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-10-16 03:10:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:10:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 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 18 [2021-10-16 03:10:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:35,068 INFO L225 Difference]: With dead ends: 76 [2021-10-16 03:10:35,069 INFO L226 Difference]: Without dead ends: 65 [2021-10-16 03:10:35,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-16 03:10:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-16 03:10:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-10-16 03:10:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-10-16 03:10:35,085 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 18 [2021-10-16 03:10:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:35,085 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-10-16 03:10:35,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-10-16 03:10:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 03:10:35,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:35,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:35,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:35,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:35,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 03:10:35,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:35,691 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash -952974365, now seen corresponding path program 1 times [2021-10-16 03:10:35,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:35,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266017675] [2021-10-16 03:10:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:35,692 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:35,693 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:35,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 03:10:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:35,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:10:35,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:36,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:10:36,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 03:10:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:36,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:36,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:36,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266017675] [2021-10-16 03:10:36,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266017675] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:36,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:36,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-16 03:10:36,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836874728] [2021-10-16 03:10:36,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:10:36,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:10:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:10:36,387 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:37,268 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-10-16 03:10:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 03:10:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 03:10:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:37,270 INFO L225 Difference]: With dead ends: 81 [2021-10-16 03:10:37,270 INFO L226 Difference]: Without dead ends: 81 [2021-10-16 03:10:37,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-10-16 03:10:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-16 03:10:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2021-10-16 03:10:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-16 03:10:37,274 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2021-10-16 03:10:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:37,274 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-16 03:10:37,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-16 03:10:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 03:10:37,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:37,276 INFO L512 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] [2021-10-16 03:10:37,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-16 03:10:37,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:37,482 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash 522565856, now seen corresponding path program 1 times [2021-10-16 03:10:37,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:37,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757134189] [2021-10-16 03:10:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:37,483 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:37,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:37,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:37,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 03:10:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:37,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:10:37,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:38,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-16 03:10:38,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 03:10:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:38,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:38,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:38,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757134189] [2021-10-16 03:10:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757134189] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:10:38,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:10:38,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 12 [2021-10-16 03:10:38,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39338480] [2021-10-16 03:10:38,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 03:10:38,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 03:10:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:10:38,853 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:10:40,461 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-10-16 03:10:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:10:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 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 22 [2021-10-16 03:10:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:10:40,463 INFO L225 Difference]: With dead ends: 80 [2021-10-16 03:10:40,463 INFO L226 Difference]: Without dead ends: 80 [2021-10-16 03:10:40,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 954.7ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:10:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-16 03:10:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2021-10-16 03:10:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-10-16 03:10:40,467 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 22 [2021-10-16 03:10:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:10:40,468 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-10-16 03:10:40,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:10:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-10-16 03:10:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 03:10:40,469 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:10:40,469 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:10:40,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-16 03:10:40,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:10:40,683 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:10:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:10:40,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1402337693, now seen corresponding path program 1 times [2021-10-16 03:10:40,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:10:40,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623246718] [2021-10-16 03:10:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:40,684 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:10:40,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:10:40,685 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:10:40,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 03:10:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:10:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:41,197 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:10:41,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-16 03:10:41,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:41,300 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:10:41,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-16 03:10:41,461 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:10:41,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 45 [2021-10-16 03:10:41,815 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:10:41,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 26 [2021-10-16 03:10:41,959 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 03:10:41,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-10-16 03:10:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:42,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:42,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2021-10-16 03:10:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:42,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:42,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623246718] [2021-10-16 03:10:42,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623246718] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:42,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [684607785] [2021-10-16 03:10:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:42,606 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:10:42,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:10:42,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:10:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-16 03:10:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 03:10:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:43,118 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:10:43,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:10:43,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:43,274 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:10:43,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-16 03:10:43,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:10:43,434 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-16 03:10:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 45 [2021-10-16 03:10:43,924 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-16 03:10:43,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 27 [2021-10-16 03:10:44,098 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 03:10:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-10-16 03:10:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:44,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:44,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:44,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2021-10-16 03:10:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:44,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [684607785] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:44,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389152876] [2021-10-16 03:10:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:10:44,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:10:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:10:44,758 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:10:44,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-16 03:10:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:10:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:10:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:10:45,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:10:45,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:10:45,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:45,325 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:10:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-16 03:10:45,434 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:10:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 47 [2021-10-16 03:10:45,654 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:10:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 26 [2021-10-16 03:10:45,752 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 03:10:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-10-16 03:10:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:45,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:46,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:46,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2021-10-16 03:10:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:46,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389152876] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:10:46,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:10:46,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 12, 10] total 21 [2021-10-16 03:10:46,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508274178] [2021-10-16 03:10:46,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-16 03:10:46,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:10:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-16 03:10:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-10-16 03:10:46,388 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:11,328 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-10-16 03:11:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 03:11:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-10-16 03:11:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:11,330 INFO L225 Difference]: With dead ends: 105 [2021-10-16 03:11:11,330 INFO L226 Difference]: Without dead ends: 105 [2021-10-16 03:11:11,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 25 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 4096.0ms TimeCoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2021-10-16 03:11:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-16 03:11:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-10-16 03:11:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-10-16 03:11:11,335 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 23 [2021-10-16 03:11:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:11,335 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-10-16 03:11:11,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-10-16 03:11:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 03:11:11,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:11,337 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:11,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:11,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:11,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:11,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:11,938 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:11:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1402337692, now seen corresponding path program 1 times [2021-10-16 03:11:11,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:11,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645880073] [2021-10-16 03:11:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:11,939 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:11,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:11,940 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:11,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 03:11:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 03:11:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:12,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:12,472 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:11:12,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:11:12,496 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:11:12,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:11:12,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:12,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:12,693 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 03:11:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-16 03:11:12,725 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-16 03:11:12,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-16 03:11:12,966 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-16 03:11:12,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 68 [2021-10-16 03:11:13,020 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-16 03:11:13,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 73 [2021-10-16 03:11:13,493 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-16 03:11:13,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 64 [2021-10-16 03:11:13,505 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:11:13,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 30 [2021-10-16 03:11:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:13,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:22,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:22,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645880073] [2021-10-16 03:11:22,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645880073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:22,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174261461] [2021-10-16 03:11:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:22,567 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:11:22,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:11:22,574 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:11:22,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-16 03:11:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:23,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 03:11:23,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:23,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:23,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:23,288 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:11:23,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:11:23,310 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:11:23,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:11:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:23,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:23,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2021-10-16 03:11:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 50 [2021-10-16 03:11:23,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:23,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:23,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:23,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 77 [2021-10-16 03:11:23,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:23,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:23,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 64 [2021-10-16 03:11:24,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:24,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 55 [2021-10-16 03:11:24,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:24,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 27 [2021-10-16 03:11:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:24,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:34,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [174261461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:34,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037848860] [2021-10-16 03:11:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:34,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:34,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:34,638 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:11:34,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-16 03:11:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 03:11:35,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:35,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:35,260 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:11:35,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:11:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:11:35,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:35,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:35,364 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 03:11:35,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-16 03:11:35,388 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-16 03:11:35,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-16 03:11:35,515 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-16 03:11:35,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 68 [2021-10-16 03:11:35,555 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-16 03:11:35,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 73 [2021-10-16 03:11:35,778 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-16 03:11:35,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 64 [2021-10-16 03:11:35,792 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 03:11:35,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 30 [2021-10-16 03:11:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:36,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:43,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037848860] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:43,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:11:43,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 26 [2021-10-16 03:11:43,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702525827] [2021-10-16 03:11:43,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-16 03:11:43,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:43,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-16 03:11:43,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=569, Unknown=4, NotChecked=0, Total=702 [2021-10-16 03:11:43,413 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:40,108 WARN L207 SmtUtils]: Spent 43.37 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-10-16 03:14:04,702 WARN L207 SmtUtils]: Spent 58.61 s on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-10-16 03:14:44,119 WARN L207 SmtUtils]: Spent 15.83 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-10-16 03:14:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:14:49,879 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-10-16 03:14:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 03:14:49,881 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 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 23 [2021-10-16 03:14:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:14:49,882 INFO L225 Difference]: With dead ends: 110 [2021-10-16 03:14:49,882 INFO L226 Difference]: Without dead ends: 110 [2021-10-16 03:14:49,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 179234.3ms TimeCoverageRelationStatistics Valid=755, Invalid=1990, Unknown=11, NotChecked=0, Total=2756 [2021-10-16 03:14:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-16 03:14:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2021-10-16 03:14:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.4) internal successors, (84), 70 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:14:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-10-16 03:14:49,888 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 23 [2021-10-16 03:14:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:14:49,888 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-10-16 03:14:49,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:14:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-10-16 03:14:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 03:14:49,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:14:49,890 INFO L512 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] [2021-10-16 03:14:49,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-16 03:14:50,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 03:14:50,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-16 03:14:50,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:14:50,494 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:14:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:14:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -980327547, now seen corresponding path program 1 times [2021-10-16 03:14:50,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:14:50,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956510172] [2021-10-16 03:14:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:14:50,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:14:50,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:14:50,496 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:14:50,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-16 03:14:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:14:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:14:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:14:51,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:14:51,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-16 03:14:51,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-10-16 03:14:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:14:51,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:14:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:14:51,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:14:51,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956510172] [2021-10-16 03:14:51,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956510172] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:14:51,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:14:51,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-16 03:14:51,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83920441] [2021-10-16 03:14:51,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 03:14:51,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:14:51,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 03:14:51,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:14:51,622 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:14:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:14:52,506 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-10-16 03:14:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 03:14:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 23 [2021-10-16 03:14:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:14:52,508 INFO L225 Difference]: With dead ends: 71 [2021-10-16 03:14:52,508 INFO L226 Difference]: Without dead ends: 71 [2021-10-16 03:14:52,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-16 03:14:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-16 03:14:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-16 03:14:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:14:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-10-16 03:14:52,512 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 23 [2021-10-16 03:14:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:14:52,512 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-10-16 03:14:52,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:14:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-10-16 03:14:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:14:52,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:14:52,514 INFO L512 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] [2021-10-16 03:14:52,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-16 03:14:52,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:14:52,722 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:14:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:14:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -522796429, now seen corresponding path program 1 times [2021-10-16 03:14:52,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:14:52,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918743019] [2021-10-16 03:14:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:14:52,724 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:14:52,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:14:52,726 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:14:52,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 03:14:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:14:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 03:14:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:14:53,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:14:53,601 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:14:53,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:14:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:14:53,752 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:14:53,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-16 03:14:53,936 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:14:53,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-10-16 03:14:54,210 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:14:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 21 [2021-10-16 03:14:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:14:54,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:14:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:14:56,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:14:56,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918743019] [2021-10-16 03:14:56,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918743019] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:14:56,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501053383] [2021-10-16 03:14:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:14:56,750 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:14:56,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:14:56,751 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:14:56,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-16 03:14:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:14:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:14:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:14:57,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:14:57,701 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:14:57,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:14:57,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:14:57,888 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:14:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-16 03:14:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:14:58,101 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-16 03:14:58,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 40 [2021-10-16 03:14:58,459 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-16 03:14:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 21 [2021-10-16 03:14:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:14:58,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:00,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501053383] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:00,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282980264] [2021-10-16 03:15:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:00,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:15:00,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:15:00,766 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:15:00,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-16 03:15:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 03:15:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:01,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:15:01,465 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:15:01,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:15:01,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:15:01,526 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:15:01,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-16 03:15:01,623 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:15:01,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-10-16 03:15:01,788 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:15:01,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 21 [2021-10-16 03:15:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:01,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:02,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282980264] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:02,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:15:02,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 11, 9] total 21 [2021-10-16 03:15:02,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104203643] [2021-10-16 03:15:02,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-16 03:15:02,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:15:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-16 03:15:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2021-10-16 03:15:02,114 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:38,723 WARN L207 SmtUtils]: Spent 10.15 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-10-16 03:15:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:15:46,434 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-10-16 03:15:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 03:15:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 03:15:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:15:46,436 INFO L225 Difference]: With dead ends: 88 [2021-10-16 03:15:46,436 INFO L226 Difference]: Without dead ends: 88 [2021-10-16 03:15:46,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 113 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 41328.2ms TimeCoverageRelationStatistics Valid=385, Invalid=1086, Unknown=11, NotChecked=0, Total=1482 [2021-10-16 03:15:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-16 03:15:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2021-10-16 03:15:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.35) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-10-16 03:15:46,440 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 24 [2021-10-16 03:15:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:15:46,440 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-10-16 03:15:46,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:15:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-10-16 03:15:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 03:15:46,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:15:46,442 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:15:46,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:46,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-16 03:15:46,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-16 03:15:47,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:15:47,043 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:15:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:15:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 973208805, now seen corresponding path program 1 times [2021-10-16 03:15:47,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:15:47,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090584387] [2021-10-16 03:15:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:47,044 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:15:47,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:15:47,045 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:15:47,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 03:15:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 03:15:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:47,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:15:47,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:15:47,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:15:47,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:15:47,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:15:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:15:47,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:15:48,010 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 03:15:48,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 57 [2021-10-16 03:15:48,038 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-16 03:15:48,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 57 [2021-10-16 03:15:48,234 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-16 03:15:48,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2021-10-16 03:15:48,284 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-16 03:15:48,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 80 [2021-10-16 03:15:48,771 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-16 03:15:48,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 71 [2021-10-16 03:15:48,780 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:15:48,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 30 [2021-10-16 03:15:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:55,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:55,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090584387] [2021-10-16 03:15:55,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090584387] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:15:55,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970054470] [2021-10-16 03:15:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:55,848 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:55,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:15:55,849 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:15:55,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-16 03:15:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 03:15:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:15:56,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:15:56,848 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:15:56,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:15:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:15:57,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:15:57,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:15:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2021-10-16 03:15:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 50 [2021-10-16 03:15:57,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:15:57,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:15:57,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:57,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2021-10-16 03:15:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:15:57,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:15:57,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:57,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 73 [2021-10-16 03:15:58,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:58,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 50 [2021-10-16 03:15:58,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:58,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 22 [2021-10-16 03:15:58,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-10-16 03:15:58,967 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 03:15:58,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-16 03:15:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:15:59,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:16:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-10-16 03:16:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:16:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [970054470] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:16:14,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792635949] [2021-10-16 03:16:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:16:14,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:16:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:16:14,189 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:16:14,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-16 03:16:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:16:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 03:16:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:16:14,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:16:14,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:16:15,056 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:16:15,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:16:15,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:16:15,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:16:15,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:16:15,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:16:15,179 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 03:16:15,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-16 03:16:15,205 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-16 03:16:15,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-16 03:16:15,382 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-16 03:16:15,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2021-10-16 03:16:15,433 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-16 03:16:15,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 80 [2021-10-16 03:16:15,690 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-16 03:16:15,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 71 [2021-10-16 03:16:15,712 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:16:15,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 30 [2021-10-16 03:16:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:16:16,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:16:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:16:19,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792635949] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:16:19,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:16:19,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 14, 12, 11, 10] total 39 [2021-10-16 03:16:19,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770077556] [2021-10-16 03:16:19,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-16 03:16:19,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:16:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-16 03:16:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1334, Unknown=6, NotChecked=0, Total=1560 [2021-10-16 03:16:19,408 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 40 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 40 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) [2021-10-16 03:16:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:16:31,422 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-10-16 03:16:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-16 03:16:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 40 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 25 [2021-10-16 03:16:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:16:31,424 INFO L225 Difference]: With dead ends: 116 [2021-10-16 03:16:31,424 INFO L226 Difference]: Without dead ends: 116 [2021-10-16 03:16:31,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 32163.6ms TimeCoverageRelationStatistics Valid=1055, Invalid=3631, Unknown=6, NotChecked=0, Total=4692 [2021-10-16 03:16:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-16 03:16:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-10-16 03:16:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:16:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-10-16 03:16:31,429 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 25 [2021-10-16 03:16:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:16:31,430 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-10-16 03:16:31,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 40 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) [2021-10-16 03:16:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-10-16 03:16:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 03:16:31,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:16:31,431 INFO L512 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] [2021-10-16 03:16:31,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-16 03:16:31,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-16 03:16:31,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-16 03:16:32,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:16:32,050 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:16:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:16:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash 839765447, now seen corresponding path program 1 times [2021-10-16 03:16:32,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:16:32,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958319281] [2021-10-16 03:16:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:16:32,051 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:16:32,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:16:32,052 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:16:32,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-16 03:16:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:16:32,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:16:32,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:16:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:16:32,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:16:32,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:16:32,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-16 03:16:33,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-16 03:16:33,183 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 03:16:33,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-10-16 03:16:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:16:33,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:16:33,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-16 03:16:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:16:33,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:16:33,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958319281] [2021-10-16 03:16:33,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958319281] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:16:33,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:16:33,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-10-16 03:16:33,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142555484] [2021-10-16 03:16:33,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:16:33,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:16:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:16:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:16:33,640 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:06,907 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-10-16 03:17:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:17:06,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 03:17:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:06,919 INFO L225 Difference]: With dead ends: 96 [2021-10-16 03:17:06,919 INFO L226 Difference]: Without dead ends: 96 [2021-10-16 03:17:06,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:17:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-16 03:17:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2021-10-16 03:17:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-10-16 03:17:06,923 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 26 [2021-10-16 03:17:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-10-16 03:17:06,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-10-16 03:17:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 03:17:06,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:06,925 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:17:06,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-16 03:17:07,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:07,138 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:17:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:07,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1834274759, now seen corresponding path program 1 times [2021-10-16 03:17:07,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:07,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265564959] [2021-10-16 03:17:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:07,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:07,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:07,140 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:07,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-16 03:17:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:17:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:07,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:17:08,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:17:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:17:08,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:17:08,174 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:17:08,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-16 03:17:08,325 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:17:08,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-10-16 03:17:08,619 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:17:08,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 20 [2021-10-16 03:17:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:08,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:23,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:23,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265564959] [2021-10-16 03:17:23,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265564959] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:17:23,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886600455] [2021-10-16 03:17:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:23,469 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:17:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:17:23,470 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:17:23,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-16 03:17:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:17:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:17:24,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:17:24,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-16 03:17:24,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:17:24,810 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:17:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-16 03:17:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:24,991 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-16 03:17:24,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-16 03:17:25,340 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-16 03:17:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 20 [2021-10-16 03:17:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:25,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:25,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [886600455] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:17:25,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870013911] [2021-10-16 03:17:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:25,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:17:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:17:25,706 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:17:25,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-16 03:17:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:17:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:26,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:17:26,654 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:17:26,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:17:26,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:17:26,722 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:17:26,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-16 03:17:26,826 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:17:26,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-10-16 03:17:27,005 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 03:17:27,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 20 [2021-10-16 03:17:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:27,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:17:27,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870013911] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:17:27,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:17:27,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 11, 9] total 21 [2021-10-16 03:17:27,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739340031] [2021-10-16 03:17:27,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-16 03:17:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-16 03:17:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=379, Unknown=6, NotChecked=0, Total=462 [2021-10-16 03:17:27,526 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:05,901 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base))) (let ((.cse0 (select .cse1 c_ULTIMATE.start_main_~y~0.offset))) (and (bvult c_ULTIMATE.start_main_~list~0.base |c_#StackHeapBarrier|) (forall ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset) c_ULTIMATE.start_main_~y~0.base)) c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset) |c_#StackHeapBarrier|)) (exists ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset)) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset)) c_ULTIMATE.start_main_~y~0.base)) (bvult .cse0 |c_#StackHeapBarrier|) (= (select .cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~y~0.offset)) c_ULTIMATE.start_main_~y~0.base) (= c_ULTIMATE.start_main_~y~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~y~0.base .cse0)) (bvult c_ULTIMATE.start_main_~y~0.base |c_#StackHeapBarrier|)))) is different from false [2021-10-16 03:18:10,024 WARN L838 $PredicateComparison]: unable to prove that (and (bvult c_ULTIMATE.start_main_~list~0.base |c_#StackHeapBarrier|) (forall ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset) c_ULTIMATE.start_main_~y~0.base)) c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset) |c_#StackHeapBarrier|)) (bvult c_ULTIMATE.start_main_~y~0.base |c_#StackHeapBarrier|)) is different from false [2021-10-16 03:18:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:12,608 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-10-16 03:18:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 03:18:12,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-10-16 03:18:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:12,610 INFO L225 Difference]: With dead ends: 150 [2021-10-16 03:18:12,610 INFO L226 Difference]: Without dead ends: 150 [2021-10-16 03:18:12,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 52404.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1218, Unknown=16, NotChecked=150, Total=1640 [2021-10-16 03:18:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-16 03:18:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2021-10-16 03:18:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.3015873015873016) internal successors, (164), 136 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2021-10-16 03:18:12,616 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 28 [2021-10-16 03:18:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:12,617 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2021-10-16 03:18:12,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2021-10-16 03:18:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 03:18:12,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:12,618 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:12,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:12,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:13,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:13,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:18:13,219 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-16 03:18:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:13,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1834263774, now seen corresponding path program 1 times [2021-10-16 03:18:13,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:18:13,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428443106] [2021-10-16 03:18:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:13,220 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:18:13,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:18:13,221 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:18:13,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-16 03:18:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:14,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-16 03:18:14,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:14,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:18:14,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:18:14,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-16 03:18:14,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:18:14,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:18:14,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-16 03:18:14,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-16 03:18:14,454 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 03:18:14,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 57 [2021-10-16 03:18:14,482 INFO L354 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2021-10-16 03:18:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 69 [2021-10-16 03:18:14,706 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-10-16 03:18:14,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 80 [2021-10-16 03:18:14,783 INFO L354 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2021-10-16 03:18:14,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 93 [2021-10-16 03:18:16,404 INFO L354 Elim1Store]: treesize reduction 118, result has 2.5 percent of original size [2021-10-16 03:18:16,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 74 [2021-10-16 03:18:16,436 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-10-16 03:18:16,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 36 [2021-10-16 03:18:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:18:16,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:18:20,227 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_main_~y~0.offset (_ BitVec 32))) (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse1 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.base)))) (store .cse6 c_ULTIMATE.start_main_~list~0.base (store (select .cse6 c_ULTIMATE.start_main_~list~0.base) .cse4 c_ULTIMATE.start_main_~y~0.base)))) (.cse5 (bvadd (_ bv8 32) ULTIMATE.start_main_~y~0.offset))) (let ((.cse2 (store (select .cse1 c_ULTIMATE.start_main_~y~0.base) .cse5 c_ULTIMATE.start_main_~y~0.base))) (let ((.cse0 (select .cse2 ULTIMATE.start_main_~y~0.offset))) (= .cse0 (select (select (store .cse1 c_ULTIMATE.start_main_~y~0.base .cse2) .cse0) (bvadd (_ bv8 32) (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.offset)))) (store .cse3 c_ULTIMATE.start_main_~list~0.base (store (select .cse3 c_ULTIMATE.start_main_~list~0.base) .cse4 ULTIMATE.start_main_~y~0.offset))) c_ULTIMATE.start_main_~y~0.base) .cse5 (bvadd ULTIMATE.start_main_~y~0.offset (_ bv12 32))) ULTIMATE.start_main_~y~0.offset))))))))) (forall ((ULTIMATE.start_main_~y~0.offset (_ BitVec 32))) (let ((.cse10 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse7 (let ((.cse13 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.offset)))) (store .cse13 c_ULTIMATE.start_main_~list~0.base (store (select .cse13 c_ULTIMATE.start_main_~list~0.base) .cse10 ULTIMATE.start_main_~y~0.offset)))) (.cse11 (bvadd (_ bv8 32) ULTIMATE.start_main_~y~0.offset))) (let ((.cse8 (store (select .cse7 c_ULTIMATE.start_main_~y~0.base) .cse11 (bvadd ULTIMATE.start_main_~y~0.offset (_ bv12 32))))) (let ((.cse12 (select .cse8 ULTIMATE.start_main_~y~0.offset))) (= (select (select (store .cse7 c_ULTIMATE.start_main_~y~0.base .cse8) (select (store (select (let ((.cse9 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.base)))) (store .cse9 c_ULTIMATE.start_main_~list~0.base (store (select .cse9 c_ULTIMATE.start_main_~list~0.base) .cse10 c_ULTIMATE.start_main_~y~0.base))) c_ULTIMATE.start_main_~y~0.base) .cse11 c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset)) (bvadd (_ bv8 32) .cse12)) (bvadd .cse12 (_ bv12 32))))))))) is different from false [2021-10-16 03:18:40,875 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~y~0.base_129 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~y~0.base_129)))) (and (forall ((v_subst_1 (_ BitVec 32))) (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~y~0.offset))) (let ((.cse1 (let ((.cse6 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~y~0.base_129 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~y~0.base_129) v_subst_1 c_ULTIMATE.start_main_~y~0.offset)))) (store .cse6 c_ULTIMATE.start_main_~y~0.base (store (select .cse6 c_ULTIMATE.start_main_~y~0.base) .cse4 v_subst_1)))) (.cse5 (bvadd (_ bv8 32) v_subst_1))) (let ((.cse2 (store (select .cse1 v_ULTIMATE.start_main_~y~0.base_129) .cse5 (bvadd v_subst_1 (_ bv12 32))))) (let ((.cse0 (select .cse2 v_subst_1))) (= (bvadd .cse0 (_ bv12 32)) (select (select (store .cse1 v_ULTIMATE.start_main_~y~0.base_129 .cse2) (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~y~0.base_129 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~y~0.base_129) v_subst_1 c_ULTIMATE.start_main_~y~0.base)))) (store .cse3 c_ULTIMATE.start_main_~y~0.base (store (select .cse3 c_ULTIMATE.start_main_~y~0.base) .cse4 v_ULTIMATE.start_main_~y~0.base_129))) v_ULTIMATE.start_main_~y~0.base_129) .cse5 v_ULTIMATE.start_main_~y~0.base_129) v_subst_1)) (bvadd .cse0 (_ bv8 32))))))))) (forall ((v_subst_2 (_ BitVec 32))) (let ((.cse11 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~y~0.offset))) (let ((.cse7 (let ((.cse13 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~y~0.base_129 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~y~0.base_129) v_subst_2 c_ULTIMATE.start_main_~y~0.base)))) (store .cse13 c_ULTIMATE.start_main_~y~0.base (store (select .cse13 c_ULTIMATE.start_main_~y~0.base) .cse11 v_ULTIMATE.start_main_~y~0.base_129)))) (.cse12 (bvadd (_ bv8 32) v_subst_2))) (let ((.cse8 (store (select .cse7 v_ULTIMATE.start_main_~y~0.base_129) .cse12 v_ULTIMATE.start_main_~y~0.base_129))) (let ((.cse9 (select .cse8 v_subst_2))) (= (select (select (store .cse7 v_ULTIMATE.start_main_~y~0.base_129 .cse8) .cse9) (bvadd (_ bv8 32) (select (store (select (let ((.cse10 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~y~0.base_129 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~y~0.base_129) v_subst_2 c_ULTIMATE.start_main_~y~0.offset)))) (store .cse10 c_ULTIMATE.start_main_~y~0.base (store (select .cse10 c_ULTIMATE.start_main_~y~0.base) .cse11 v_subst_2))) v_ULTIMATE.start_main_~y~0.base_129) .cse12 (bvadd v_subst_2 (_ bv12 32))) v_subst_2))) .cse9))))))))) is different from false [2021-10-16 03:18:47,089 WARN L207 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 134 DAG size of output: 42 [2021-10-16 03:18:47,090 INFO L354 Elim1Store]: treesize reduction 2375, result has 2.8 percent of original size [2021-10-16 03:18:47,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 14361 treesize of output 7083 [2021-10-16 03:18:48,551 INFO L354 Elim1Store]: treesize reduction 700, result has 14.9 percent of original size [2021-10-16 03:18:48,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 10249 treesize of output 3560 [2021-10-16 03:18:48,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:18:48,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3438 treesize of output 3368 [2021-10-16 03:18:48,827 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:18:48,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3368 treesize of output 3190 [2021-10-16 03:18:48,984 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-16 03:18:48,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3190 treesize of output 3080 [2021-10-16 03:18:49,117 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-16 03:18:49,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3080 treesize of output 2992 [2021-10-16 03:18:49,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:18:49,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428443106] [2021-10-16 03:18:49,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-10-16 03:18:49,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493521833] [2021-10-16 03:18:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:49,150 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:18:49,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:18:49,154 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:18:49,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-16 03:18:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-16 03:18:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:50,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@630a024d [2021-10-16 03:18:50,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361933275] [2021-10-16 03:18:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:50,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:18:50,414 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:18:50,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-16 03:18:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-16 03:18:51,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:51,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@630a024d [2021-10-16 03:18:51,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:18:51,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 03:18:51,411 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 03:18:51,411 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 03:18:51,418 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:18:51,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 03:18:51,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 03:18:51,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 03:18:51,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 03:18:51,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 03:18:51,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 03:18:51,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 03:18:51,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 03:18:51,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-16 03:18:51,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-16 03:18:51,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-16 03:18:51,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-16 03:18:51,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-16 03:18:51,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-16 03:18:51,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-16 03:18:51,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-16 03:18:51,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-16 03:18:51,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-16 03:18:51,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-16 03:18:51,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-16 03:18:51,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:18:51,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:18:51,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:18:51,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:18:51,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:18:51,426 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:18:51,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:51,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-16 03:18:51,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:52,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:18:52,037 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:18:52,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:18:52 BoogieIcfgContainer [2021-10-16 03:18:52,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:18:52,051 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:18:52,051 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:18:52,051 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:18:52,051 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:10:06" (3/4) ... [2021-10-16 03:18:52,054 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:18:52,054 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:18:52,055 INFO L168 Benchmark]: Toolchain (without parser) took 526581.79 ms. Allocated memory was 73.4 MB in the beginning and 102.8 MB in the end (delta: 29.4 MB). Free memory was 55.9 MB in the beginning and 46.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:52,055 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 73.4 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:18:52,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.18 ms. Allocated memory is still 73.4 MB. Free memory was 55.8 MB in the beginning and 49.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:52,055 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.79 ms. Allocated memory is still 73.4 MB. Free memory was 49.1 MB in the beginning and 47.3 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:18:52,056 INFO L168 Benchmark]: Boogie Preprocessor took 56.39 ms. Allocated memory is still 73.4 MB. Free memory was 47.3 MB in the beginning and 45.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:52,056 INFO L168 Benchmark]: RCFGBuilder took 630.53 ms. Allocated memory is still 73.4 MB. Free memory was 45.5 MB in the beginning and 53.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:52,056 INFO L168 Benchmark]: TraceAbstraction took 525199.40 ms. Allocated memory was 73.4 MB in the beginning and 102.8 MB in the end (delta: 29.4 MB). Free memory was 53.2 MB in the beginning and 46.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:18:52,057 INFO L168 Benchmark]: Witness Printer took 3.07 ms. Allocated memory is still 102.8 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:18:52,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 73.4 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 637.18 ms. Allocated memory is still 73.4 MB. Free memory was 55.8 MB in the beginning and 49.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.79 ms. Allocated memory is still 73.4 MB. Free memory was 49.1 MB in the beginning and 47.3 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.39 ms. Allocated memory is still 73.4 MB. Free memory was 47.3 MB in the beginning and 45.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 630.53 ms. Allocated memory is still 73.4 MB. Free memory was 45.5 MB in the beginning and 53.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 525199.40 ms. Allocated memory was 73.4 MB in the beginning and 102.8 MB in the end (delta: 29.4 MB). Free memory was 53.2 MB in the beginning and 46.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.07 ms. Allocated memory is still 102.8 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 565]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L537] Node* list = ((void *)0); [L538] Node* y = ((void *)0); [L539] y = malloc(sizeof(*y)) [L540] y->next = ((void *)0) [L541] y->prev = ((void *)0) [L542] y->pData = &y->data [L543] list = y [L544] COND TRUE __VERIFIER_nondet_int() [L546] y = malloc(sizeof(*y)) [L547] y->next = list [L548] list->prev = y [L549] COND FALSE !(__VERIFIER_nondet_int()) [L555] y->pData = &y->data [L557] list = y [L544] COND FALSE !(__VERIFIER_nondet_int()) [L559] COND TRUE ((void *)0) != list [L561] y = list [L562] EXPR list->next [L562] list = list->next [L563] EXPR y->pData [L563] COND FALSE !(&y->data != y->pData) [L567] free(y) [L567] free(y) [L567] free(y) [L559] COND TRUE ((void *)0) != list [L561] y = list [L562] EXPR list->next [L562] list = list->next [L563] EXPR y->pData [L563] COND TRUE &y->data != y->pData [L565] EXPR y->pData [L565] free(y->pData) - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 57 locations, 27 error locations. Started 1 CEGAR loops. OverallTime: 525129.3ms, OverallIterations: 21, TraceHistogramMax: 2, EmptinessCheckTime: 27.4ms, AutomataDifference: 361031.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 461 SDtfs, 1744 SDslu, 1627 SDs, 0 SdLazy, 4149 SolverSat, 761 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 111571.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1415 GetRequests, 966 SyntacticMatches, 70 SemanticMatches, 379 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3953 ImplicationChecksByTransitivity, 322155.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=20, InterpolantAutomatonStates: 260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 128.8ms AutomataMinimizationTime, 20 MinimizatonAttempts, 283 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 284.9ms SsaConstructionTime, 2364.8ms SatisfiabilityAnalysisTime, 103960.0ms InterpolantComputationTime, 655 NumberOfCodeBlocks, 655 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 1242 ConstructedInterpolants, 224 QuantifiedInterpolants, 19304 SizeOfPredicates, 285 NumberOfNonLiveVariables, 3186 ConjunctsInSsa, 405 ConjunctsInUnsatCore, 68 InterpolantComputations, 26 PerfectInterpolantSequences, 16/154 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 03:18:52,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2a88e84-05fc-4504-87e1-c9fe0fb039fd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...