./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:49:36,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:49:36,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:49:36,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:49:36,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:49:36,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:49:36,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:49:36,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:49:36,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:49:36,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:49:36,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:49:36,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:49:36,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:49:36,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:49:36,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:49:36,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:49:36,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:49:36,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:49:36,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:49:36,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:49:36,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:49:36,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:49:36,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:49:36,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:49:36,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:49:36,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:49:36,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:49:36,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:49:36,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:49:36,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:49:36,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:49:36,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:49:36,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:49:36,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:49:36,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:49:36,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:49:36,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:49:36,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:49:36,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:49:36,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:49:36,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:49:36,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 06:49:36,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:49:36,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:49:36,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:49:36,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:49:36,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:49:36,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:49:36,675 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:49:36,675 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:49:36,675 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:49:36,676 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:49:36,677 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:49:36,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:49:36,677 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:49:36,678 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:49:36,678 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:49:36,678 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:49:36,678 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:49:36,679 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:49:36,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:49:36,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:49:36,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:49:36,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:49:36,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:49:36,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:49:36,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:49:36,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:49:36,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:49:36,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:49:36,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:49:36,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:49:36,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:49:36,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:49:36,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:49:36,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:49:36,685 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:49:36,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:49:36,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:49:36,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:49:36,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2022-11-19 06:49:37,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:49:37,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:49:37,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:49:37,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:49:37,077 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:49:37,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-11-19 06:49:37,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/fda589c75/5168d4d027294111a365c8618c3bb8db/FLAGf10433b5d [2022-11-19 06:49:38,241 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:49:38,242 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-11-19 06:49:38,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/fda589c75/5168d4d027294111a365c8618c3bb8db/FLAGf10433b5d [2022-11-19 06:49:38,653 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/fda589c75/5168d4d027294111a365c8618c3bb8db [2022-11-19 06:49:38,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:49:38,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:49:38,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:49:38,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:49:38,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:49:38,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:49:38" (1/1) ... [2022-11-19 06:49:38,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eace0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:38, skipping insertion in model container [2022-11-19 06:49:38,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:49:38" (1/1) ... [2022-11-19 06:49:38,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:49:38,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:49:39,921 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2022-11-19 06:49:40,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:49:40,412 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:49:40,566 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2022-11-19 06:49:40,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:49:40,837 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:49:40,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40 WrapperNode [2022-11-19 06:49:40,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:49:40,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:49:40,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:49:40,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:49:40,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:40,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,035 INFO L138 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2397 [2022-11-19 06:49:41,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:49:41,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:49:41,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:49:41,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:49:41,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:49:41,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:49:41,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:49:41,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:49:41,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (1/1) ... [2022-11-19 06:49:41,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:49:41,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:41,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:49:41,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:49:41,297 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 06:49:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 06:49:41,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 06:49:41,297 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2022-11-19 06:49:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2022-11-19 06:49:41,298 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-19 06:49:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-19 06:49:41,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 06:49:41,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 06:49:41,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 06:49:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 06:49:41,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:49:41,299 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2022-11-19 06:49:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2022-11-19 06:49:41,299 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2022-11-19 06:49:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2022-11-19 06:49:41,299 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2022-11-19 06:49:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2022-11-19 06:49:41,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 06:49:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 06:49:41,300 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-19 06:49:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-19 06:49:41,300 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 06:49:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 06:49:41,300 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2022-11-19 06:49:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2022-11-19 06:49:41,300 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 06:49:41,301 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 06:49:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2022-11-19 06:49:41,301 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2022-11-19 06:49:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2022-11-19 06:49:41,302 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2022-11-19 06:49:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-19 06:49:41,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-19 06:49:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 06:49:41,302 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 06:49:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:49:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 06:49:41,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 06:49:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 06:49:41,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 06:49:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 06:49:41,303 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 06:49:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:49:41,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:49:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2022-11-19 06:49:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2022-11-19 06:49:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:49:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2022-11-19 06:49:41,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2022-11-19 06:49:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-19 06:49:41,307 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-19 06:49:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 06:49:41,308 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 06:49:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:49:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:49:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:49:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-19 06:49:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-19 06:49:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2022-11-19 06:49:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2022-11-19 06:49:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-19 06:49:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-19 06:49:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:49:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-19 06:49:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-19 06:49:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-19 06:49:41,311 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-19 06:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:49:41,311 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-19 06:49:41,312 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-19 06:49:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 06:49:41,312 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 06:49:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2022-11-19 06:49:41,312 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2022-11-19 06:49:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:49:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-19 06:49:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-19 06:49:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 06:49:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 06:49:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 06:49:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-19 06:49:41,314 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-19 06:49:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:49:41,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:49:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2022-11-19 06:49:41,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2022-11-19 06:49:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-19 06:49:41,316 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-19 06:49:42,099 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:49:42,104 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:49:42,762 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 06:49:46,674 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:49:47,823 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:49:47,824 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 06:49:47,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:49:47 BoogieIcfgContainer [2022-11-19 06:49:47,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:49:47,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:49:47,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:49:47,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:49:47,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:49:38" (1/3) ... [2022-11-19 06:49:47,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e86eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:49:47, skipping insertion in model container [2022-11-19 06:49:47,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:40" (2/3) ... [2022-11-19 06:49:47,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e86eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:49:47, skipping insertion in model container [2022-11-19 06:49:47,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:49:47" (3/3) ... [2022-11-19 06:49:47,840 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-11-19 06:49:47,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:49:47,867 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:49:47,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:49:47,949 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@24810fd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:49:47,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:49:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-19 06:49:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 06:49:47,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:47,968 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:47,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:47,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1184773643, now seen corresponding path program 1 times [2022-11-19 06:49:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:47,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238824074] [2022-11-19 06:49:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-19 06:49:48,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238824074] [2022-11-19 06:49:48,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238824074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:48,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:48,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:49:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263873362] [2022-11-19 06:49:48,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:49:48,628 INFO L87 Difference]: Start difference. First operand has 474 states, 320 states have (on average 1.440625) internal successors, (461), 334 states have internal predecessors, (461), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:49:51,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:49:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:51,628 INFO L93 Difference]: Finished difference Result 1360 states and 2007 transitions. [2022-11-19 06:49:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:51,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 71 [2022-11-19 06:49:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:51,652 INFO L225 Difference]: With dead ends: 1360 [2022-11-19 06:49:51,652 INFO L226 Difference]: Without dead ends: 895 [2022-11-19 06:49:51,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:49:51,663 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 622 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:51,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1241 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 06:49:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-19 06:49:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 894. [2022-11-19 06:49:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 615 states have (on average 1.4178861788617887) internal successors, (872), 631 states have internal predecessors, (872), 208 states have call successors, (208), 71 states have call predecessors, (208), 70 states have return successors, (207), 206 states have call predecessors, (207), 207 states have call successors, (207) [2022-11-19 06:49:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1287 transitions. [2022-11-19 06:49:51,842 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1287 transitions. Word has length 71 [2022-11-19 06:49:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:51,843 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1287 transitions. [2022-11-19 06:49:51,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:49:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1287 transitions. [2022-11-19 06:49:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 06:49:51,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:51,856 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:49:51,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1655794453, now seen corresponding path program 1 times [2022-11-19 06:49:51,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:51,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867635416] [2022-11-19 06:49:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:51,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-19 06:49:52,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867635416] [2022-11-19 06:49:52,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867635416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:52,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:52,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:49:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586270773] [2022-11-19 06:49:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:52,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:49:52,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:52,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:49:52,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:49:52,401 INFO L87 Difference]: Start difference. First operand 894 states and 1287 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:49:55,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:49:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:55,454 INFO L93 Difference]: Finished difference Result 1765 states and 2567 transitions. [2022-11-19 06:49:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:49:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 74 [2022-11-19 06:49:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:55,469 INFO L225 Difference]: With dead ends: 1765 [2022-11-19 06:49:55,469 INFO L226 Difference]: Without dead ends: 1760 [2022-11-19 06:49:55,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:49:55,473 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 648 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:55,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 1882 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 06:49:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-11-19 06:49:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1751. [2022-11-19 06:49:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1206 states have (on average 1.4212271973466004) internal successors, (1714), 1238 states have internal predecessors, (1714), 404 states have call successors, (404), 141 states have call predecessors, (404), 140 states have return successors, (431), 400 states have call predecessors, (431), 403 states have call successors, (431) [2022-11-19 06:49:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2549 transitions. [2022-11-19 06:49:55,587 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2549 transitions. Word has length 74 [2022-11-19 06:49:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:55,588 INFO L495 AbstractCegarLoop]: Abstraction has 1751 states and 2549 transitions. [2022-11-19 06:49:55,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:49:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2549 transitions. [2022-11-19 06:49:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 06:49:55,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:55,596 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:55,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:49:55,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2123958670, now seen corresponding path program 1 times [2022-11-19 06:49:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:55,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488078636] [2022-11-19 06:49:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:55,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-19 06:49:55,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:55,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488078636] [2022-11-19 06:49:55,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488078636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:55,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:55,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:49:55,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571985358] [2022-11-19 06:49:55,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:55,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:55,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:55,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:49:55,874 INFO L87 Difference]: Start difference. First operand 1751 states and 2549 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 06:49:58,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:49:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:58,649 INFO L93 Difference]: Finished difference Result 4320 states and 6257 transitions. [2022-11-19 06:49:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2022-11-19 06:49:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:58,667 INFO L225 Difference]: With dead ends: 4320 [2022-11-19 06:49:58,668 INFO L226 Difference]: Without dead ends: 2590 [2022-11-19 06:49:58,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:49:58,676 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 335 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:58,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1115 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 06:49:58,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-11-19 06:49:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2583. [2022-11-19 06:49:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 1786 states have (on average 1.4143337066069428) internal successors, (2526), 1828 states have internal predecessors, (2526), 584 states have call successors, (584), 213 states have call predecessors, (584), 212 states have return successors, (619), 578 states have call predecessors, (619), 583 states have call successors, (619) [2022-11-19 06:49:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 3729 transitions. [2022-11-19 06:49:58,818 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 3729 transitions. Word has length 114 [2022-11-19 06:49:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:58,819 INFO L495 AbstractCegarLoop]: Abstraction has 2583 states and 3729 transitions. [2022-11-19 06:49:58,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 06:49:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 3729 transitions. [2022-11-19 06:49:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 06:49:58,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:58,827 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:49:58,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1241406857, now seen corresponding path program 1 times [2022-11-19 06:49:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:58,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207004628] [2022-11-19 06:49:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:58,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-11-19 06:49:59,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:59,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207004628] [2022-11-19 06:49:59,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207004628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:59,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:59,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:49:59,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525338292] [2022-11-19 06:49:59,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:59,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:59,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:49:59,087 INFO L87 Difference]: Start difference. First operand 2583 states and 3729 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 06:50:01,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:50:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:01,985 INFO L93 Difference]: Finished difference Result 6403 states and 9216 transitions. [2022-11-19 06:50:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:01,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 146 [2022-11-19 06:50:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:02,016 INFO L225 Difference]: With dead ends: 6403 [2022-11-19 06:50:02,017 INFO L226 Difference]: Without dead ends: 3841 [2022-11-19 06:50:02,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:02,037 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 448 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:02,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1388 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 06:50:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2022-11-19 06:50:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3835. [2022-11-19 06:50:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 2687 states have (on average 1.4224041682173427) internal successors, (3822), 2753 states have internal predecessors, (3822), 813 states have call successors, (813), 335 states have call predecessors, (813), 334 states have return successors, (870), 803 states have call predecessors, (870), 812 states have call successors, (870) [2022-11-19 06:50:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 5505 transitions. [2022-11-19 06:50:02,341 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 5505 transitions. Word has length 146 [2022-11-19 06:50:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:02,342 INFO L495 AbstractCegarLoop]: Abstraction has 3835 states and 5505 transitions. [2022-11-19 06:50:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 06:50:02,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 5505 transitions. [2022-11-19 06:50:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 06:50:02,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:02,352 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:02,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:50:02,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash 908814026, now seen corresponding path program 1 times [2022-11-19 06:50:02,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:02,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628269538] [2022-11-19 06:50:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:02,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 06:50:02,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628269538] [2022-11-19 06:50:02,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628269538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:02,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:02,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:50:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637829393] [2022-11-19 06:50:02,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:02,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:02,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:02,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:02,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:02,537 INFO L87 Difference]: Start difference. First operand 3835 states and 5505 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 06:50:05,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:50:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:05,583 INFO L93 Difference]: Finished difference Result 9352 states and 13351 transitions. [2022-11-19 06:50:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 141 [2022-11-19 06:50:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:05,626 INFO L225 Difference]: With dead ends: 9352 [2022-11-19 06:50:05,627 INFO L226 Difference]: Without dead ends: 5546 [2022-11-19 06:50:05,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:05,641 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 443 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:05,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1155 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 06:50:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2022-11-19 06:50:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5439. [2022-11-19 06:50:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 3837 states have (on average 1.4068282512379464) internal successors, (5398), 3922 states have internal predecessors, (5398), 1091 states have call successors, (1091), 511 states have call predecessors, (1091), 510 states have return successors, (1174), 1086 states have call predecessors, (1174), 1090 states have call successors, (1174) [2022-11-19 06:50:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7663 transitions. [2022-11-19 06:50:05,996 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7663 transitions. Word has length 141 [2022-11-19 06:50:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:05,997 INFO L495 AbstractCegarLoop]: Abstraction has 5439 states and 7663 transitions. [2022-11-19 06:50:05,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 06:50:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7663 transitions. [2022-11-19 06:50:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 06:50:06,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:06,006 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:06,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:50:06,007 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1551803655, now seen corresponding path program 1 times [2022-11-19 06:50:06,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:06,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507743603] [2022-11-19 06:50:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:06,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-11-19 06:50:06,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:06,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507743603] [2022-11-19 06:50:06,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507743603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:06,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:06,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:50:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151042990] [2022-11-19 06:50:06,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:06,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:50:06,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:06,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:50:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:50:06,564 INFO L87 Difference]: Start difference. First operand 5439 states and 7663 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 06:50:09,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:50:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:09,727 INFO L93 Difference]: Finished difference Result 8172 states and 11559 transitions. [2022-11-19 06:50:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:50:09,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 135 [2022-11-19 06:50:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:09,780 INFO L225 Difference]: With dead ends: 8172 [2022-11-19 06:50:09,780 INFO L226 Difference]: Without dead ends: 8167 [2022-11-19 06:50:09,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:50:09,787 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 621 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:09,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1868 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 06:50:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2022-11-19 06:50:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 8133. [2022-11-19 06:50:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 5733 states have (on average 1.4064189778475493) internal successors, (8063), 5861 states have internal predecessors, (8063), 1634 states have call successors, (1634), 766 states have call predecessors, (1634), 765 states have return successors, (1801), 1627 states have call predecessors, (1801), 1633 states have call successors, (1801) [2022-11-19 06:50:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 11498 transitions. [2022-11-19 06:50:10,349 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 11498 transitions. Word has length 135 [2022-11-19 06:50:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:10,351 INFO L495 AbstractCegarLoop]: Abstraction has 8133 states and 11498 transitions. [2022-11-19 06:50:10,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 06:50:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 11498 transitions. [2022-11-19 06:50:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 06:50:10,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:10,363 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:10,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:50:10,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1300629694, now seen corresponding path program 1 times [2022-11-19 06:50:10,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:10,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527753844] [2022-11-19 06:50:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:10,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-19 06:50:10,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527753844] [2022-11-19 06:50:10,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527753844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:10,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:10,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:50:10,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747957722] [2022-11-19 06:50:10,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:10,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:10,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:10,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:10,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:10,525 INFO L87 Difference]: Start difference. First operand 8133 states and 11498 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 06:50:13,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:50:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:13,419 INFO L93 Difference]: Finished difference Result 10916 states and 15630 transitions. [2022-11-19 06:50:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:13,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 145 [2022-11-19 06:50:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:13,472 INFO L225 Difference]: With dead ends: 10916 [2022-11-19 06:50:13,472 INFO L226 Difference]: Without dead ends: 8183 [2022-11-19 06:50:13,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:13,487 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 4 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:13,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1120 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 06:50:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2022-11-19 06:50:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 8183. [2022-11-19 06:50:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8183 states, 5773 states have (on average 1.4036029793868006) internal successors, (8103), 5911 states have internal predecessors, (8103), 1634 states have call successors, (1634), 766 states have call predecessors, (1634), 775 states have return successors, (1811), 1627 states have call predecessors, (1811), 1633 states have call successors, (1811) [2022-11-19 06:50:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8183 states to 8183 states and 11548 transitions. [2022-11-19 06:50:13,964 INFO L78 Accepts]: Start accepts. Automaton has 8183 states and 11548 transitions. Word has length 145 [2022-11-19 06:50:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:13,968 INFO L495 AbstractCegarLoop]: Abstraction has 8183 states and 11548 transitions. [2022-11-19 06:50:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 06:50:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8183 states and 11548 transitions. [2022-11-19 06:50:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 06:50:13,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:13,980 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:50:13,981 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1609066058, now seen corresponding path program 1 times [2022-11-19 06:50:13,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:13,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913104565] [2022-11-19 06:50:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:13,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-19 06:50:14,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913104565] [2022-11-19 06:50:14,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913104565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362897007] [2022-11-19 06:50:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:14,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:14,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:14,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:50:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:15,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:50:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-19 06:50:16,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-19 06:50:17,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362897007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:17,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1786454745] [2022-11-19 06:50:17,865 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-19 06:50:17,865 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:17,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:17,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:17,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:18,229 INFO L350 Elim1Store]: Elim1 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 49 [2022-11-19 06:50:18,313 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 47 [2022-11-19 06:50:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:18,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-11-19 06:50:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:19,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-11-19 06:50:34,101 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 06:50:34,110 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-11-19 06:50:34,118 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 06:50:34,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:50:34,501 INFO L350 Elim1Store]: Elim1 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 143 treesize of output 139 [2022-11-19 06:50:34,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:50:34,543 INFO L350 Elim1Store]: Elim1 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 131 treesize of output 127 [2022-11-19 06:50:34,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:50:34,763 INFO L350 Elim1Store]: Elim1 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 143 treesize of output 139 [2022-11-19 06:50:34,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:50:34,808 INFO L350 Elim1Store]: Elim1 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 131 treesize of output 127 [2022-11-19 06:50:35,068 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-11-19 06:50:35,076 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-11-19 06:50:35,104 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-11-19 06:50:35,113 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-11-19 06:50:35,133 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:50:53,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:50:54,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:54,172 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) 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.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-19 06:50:54,176 INFO L158 Benchmark]: Toolchain (without parser) took 75517.66ms. Allocated memory was 144.7MB in the beginning and 876.6MB in the end (delta: 731.9MB). Free memory was 102.7MB in the beginning and 571.8MB in the end (delta: -469.0MB). Peak memory consumption was 653.2MB. Max. memory is 16.1GB. [2022-11-19 06:50:54,176 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 50.0MB in the beginning and 50.0MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:50:54,177 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2173.06ms. Allocated memory was 144.7MB in the beginning and 186.6MB in the end (delta: 41.9MB). Free memory was 102.5MB in the beginning and 124.2MB in the end (delta: -21.7MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2022-11-19 06:50:54,177 INFO L158 Benchmark]: Boogie Procedure Inliner took 196.57ms. Allocated memory is still 186.6MB. Free memory was 124.2MB in the beginning and 109.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 06:50:54,177 INFO L158 Benchmark]: Boogie Preprocessor took 153.92ms. Allocated memory is still 186.6MB. Free memory was 109.5MB in the beginning and 94.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 06:50:54,177 INFO L158 Benchmark]: RCFGBuilder took 6637.15ms. Allocated memory was 186.6MB in the beginning and 274.7MB in the end (delta: 88.1MB). Free memory was 94.8MB in the beginning and 193.0MB in the end (delta: -98.2MB). Peak memory consumption was 126.7MB. Max. memory is 16.1GB. [2022-11-19 06:50:54,178 INFO L158 Benchmark]: TraceAbstraction took 66343.78ms. Allocated memory was 274.7MB in the beginning and 876.6MB in the end (delta: 601.9MB). Free memory was 193.0MB in the beginning and 571.8MB in the end (delta: -378.8MB). Peak memory consumption was 614.2MB. Max. memory is 16.1GB. [2022-11-19 06:50:54,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 50.0MB in the beginning and 50.0MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2173.06ms. Allocated memory was 144.7MB in the beginning and 186.6MB in the end (delta: 41.9MB). Free memory was 102.5MB in the beginning and 124.2MB in the end (delta: -21.7MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 196.57ms. Allocated memory is still 186.6MB. Free memory was 124.2MB in the beginning and 109.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 153.92ms. Allocated memory is still 186.6MB. Free memory was 109.5MB in the beginning and 94.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * RCFGBuilder took 6637.15ms. Allocated memory was 186.6MB in the beginning and 274.7MB in the end (delta: 88.1MB). Free memory was 94.8MB in the beginning and 193.0MB in the end (delta: -98.2MB). Peak memory consumption was 126.7MB. Max. memory is 16.1GB. * TraceAbstraction took 66343.78ms. Allocated memory was 274.7MB in the beginning and 876.6MB in the end (delta: 601.9MB). Free memory was 193.0MB in the beginning and 571.8MB in the end (delta: -378.8MB). Peak memory consumption was 614.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-19 06:50:54,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:50:56,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:50:56,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:50:56,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:50:56,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:50:56,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:50:56,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:50:56,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:50:56,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:50:56,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:50:56,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:50:56,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:50:56,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:50:56,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:50:56,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:50:56,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:50:56,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:50:56,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:50:56,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:50:56,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:50:56,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:50:56,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:50:56,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:50:56,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:50:56,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:50:56,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:50:56,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:50:56,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:50:56,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:50:56,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:50:56,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:50:56,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:50:56,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:50:56,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:50:56,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:50:56,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:50:56,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:50:56,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:50:56,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:50:56,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:50:56,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:50:56,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-19 06:50:56,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:50:56,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:50:56,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:50:56,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:50:56,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:50:56,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:50:56,863 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:50:56,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:50:56,863 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:50:56,863 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:50:56,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:50:56,865 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:50:56,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:50:56,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:50:56,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:50:56,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:50:56,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:50:56,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:50:56,868 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 06:50:56,868 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 06:50:56,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:50:56,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:50:56,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:50:56,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:50:56,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 06:50:56,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:50:56,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:50:56,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:50:56,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:50:56,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:50:56,871 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 06:50:56,871 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 06:50:56,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:50:56,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:50:56,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 06:50:56,872 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_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2022-11-19 06:50:57,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:50:57,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:50:57,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:50:57,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:50:57,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:50:57,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-11-19 06:50:57,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/f8040499b/cb5264caa4d94c208ee64aaf50617d82/FLAGb6009f33a [2022-11-19 06:50:58,301 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:50:58,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-11-19 06:50:58,352 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/f8040499b/cb5264caa4d94c208ee64aaf50617d82/FLAGb6009f33a [2022-11-19 06:50:58,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/data/f8040499b/cb5264caa4d94c208ee64aaf50617d82 [2022-11-19 06:50:58,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:50:58,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:50:58,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:50:58,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:50:58,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:50:58,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:58" (1/1) ... [2022-11-19 06:50:58,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f8f6a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:58, skipping insertion in model container [2022-11-19 06:50:58,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:58" (1/1) ... [2022-11-19 06:50:58,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:50:58,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:51:00,052 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2022-11-19 06:51:00,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:51:00,694 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 06:51:00,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:51:00,893 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2022-11-19 06:51:01,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:51:01,023 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:51:01,185 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2022-11-19 06:51:01,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:51:01,459 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:51:01,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01 WrapperNode [2022-11-19 06:51:01,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:51:01,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:51:01,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:51:01,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:51:01,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,698 INFO L138 Inliner]: procedures = 194, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2299 [2022-11-19 06:51:01,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:51:01,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:51:01,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:51:01,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:51:01,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:51:01,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:51:01,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:51:01,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:51:01,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (1/1) ... [2022-11-19 06:51:01,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:51:01,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:01,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:51:01,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:51:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-19 06:51:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-19 06:51:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2022-11-19 06:51:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2022-11-19 06:51:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 06:51:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 06:51:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-19 06:51:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 06:51:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 06:51:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 06:51:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 06:51:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 06:51:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2022-11-19 06:51:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2022-11-19 06:51:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-19 06:51:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-19 06:51:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 06:51:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 06:51:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 06:51:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 06:51:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:51:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:51:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 06:51:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 06:51:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:51:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2022-11-19 06:51:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2022-11-19 06:51:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:51:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-19 06:51:02,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-19 06:51:02,008 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-19 06:51:02,009 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-19 06:51:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-19 06:51:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-19 06:51:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-19 06:51:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:51:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 06:51:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:51:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-19 06:51:02,010 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-19 06:51:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 06:51:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-19 06:51:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-19 06:51:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-19 06:51:02,011 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-19 06:51:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 06:51:02,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 06:51:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-19 06:51:02,014 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-19 06:51:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 06:51:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 06:51:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-19 06:51:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-19 06:51:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2022-11-19 06:51:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2022-11-19 06:51:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2022-11-19 06:51:02,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2022-11-19 06:51:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2022-11-19 06:51:02,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2022-11-19 06:51:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 06:51:02,017 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 06:51:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-19 06:51:02,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-19 06:51:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 06:51:02,018 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 06:51:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2022-11-19 06:51:02,018 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2022-11-19 06:51:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2022-11-19 06:51:02,019 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2022-11-19 06:51:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 06:51:02,019 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 06:51:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-19 06:51:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-11-19 06:51:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-19 06:51:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-11-19 06:51:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 06:51:02,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 06:51:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2022-11-19 06:51:02,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2022-11-19 06:51:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:51:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2022-11-19 06:51:02,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2022-11-19 06:51:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-19 06:51:02,021 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-19 06:51:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:51:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:51:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-11-19 06:51:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-11-19 06:51:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-19 06:51:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-19 06:51:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-19 06:51:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-19 06:51:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-19 06:51:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 06:51:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 06:51:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2022-11-19 06:51:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2022-11-19 06:51:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-19 06:51:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:51:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:51:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2022-11-19 06:51:02,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2022-11-19 06:51:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-19 06:51:02,025 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-19 06:51:02,761 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:51:02,765 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:51:04,051 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 06:51:15,655 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:51:15,688 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:51:15,700 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 06:51:15,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:51:15 BoogieIcfgContainer [2022-11-19 06:51:15,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:51:15,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:51:15,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:51:15,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:51:15,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:50:58" (1/3) ... [2022-11-19 06:51:15,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3258b8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:51:15, skipping insertion in model container [2022-11-19 06:51:15,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:51:01" (2/3) ... [2022-11-19 06:51:15,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3258b8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:51:15, skipping insertion in model container [2022-11-19 06:51:15,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:51:15" (3/3) ... [2022-11-19 06:51:15,730 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2022-11-19 06:51:15,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:51:15,761 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:51:15,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:51:15,887 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d28b6c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:51:15,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:51:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 718 states, 564 states have (on average 1.4361702127659575) internal successors, (810), 578 states have internal predecessors, (810), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-19 06:51:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 06:51:15,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:15,918 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:15,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash 192052637, now seen corresponding path program 1 times [2022-11-19 06:51:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:15,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536679892] [2022-11-19 06:51:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:15,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:15,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:15,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:15,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 06:51:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:51:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-19 06:51:16,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:16,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:16,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536679892] [2022-11-19 06:51:16,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536679892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:16,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:16,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:16,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950123747] [2022-11-19 06:51:16,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:16,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:16,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:16,849 INFO L87 Difference]: Start difference. First operand has 718 states, 564 states have (on average 1.4361702127659575) internal successors, (810), 578 states have internal predecessors, (810), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:51:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:17,258 INFO L93 Difference]: Finished difference Result 2099 states and 3098 transitions. [2022-11-19 06:51:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 78 [2022-11-19 06:51:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:17,296 INFO L225 Difference]: With dead ends: 2099 [2022-11-19 06:51:17,296 INFO L226 Difference]: Without dead ends: 1370 [2022-11-19 06:51:17,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:17,319 INFO L413 NwaCegarLoop]: 1134 mSDtfsCounter, 963 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 2145 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:17,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 2145 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:51:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2022-11-19 06:51:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1370. [2022-11-19 06:51:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1088 states have (on average 1.4227941176470589) internal successors, (1548), 1104 states have internal predecessors, (1548), 211 states have call successors, (211), 71 states have call predecessors, (211), 70 states have return successors, (210), 210 states have call predecessors, (210), 210 states have call successors, (210) [2022-11-19 06:51:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1969 transitions. [2022-11-19 06:51:17,582 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1969 transitions. Word has length 78 [2022-11-19 06:51:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:17,583 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1969 transitions. [2022-11-19 06:51:17,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:51:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1969 transitions. [2022-11-19 06:51:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 06:51:17,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:17,601 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:17,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:17,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:17,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1136219045, now seen corresponding path program 1 times [2022-11-19 06:51:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815433185] [2022-11-19 06:51:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:17,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:17,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:17,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 06:51:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:18,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:51:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-19 06:51:18,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:18,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815433185] [2022-11-19 06:51:18,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815433185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:18,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:18,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:51:18,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533712170] [2022-11-19 06:51:18,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:18,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:51:18,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:18,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:51:18,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:51:18,645 INFO L87 Difference]: Start difference. First operand 1370 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:51:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:19,922 INFO L93 Difference]: Finished difference Result 3062 states and 4447 transitions. [2022-11-19 06:51:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:51:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 82 [2022-11-19 06:51:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:19,935 INFO L225 Difference]: With dead ends: 3062 [2022-11-19 06:51:19,936 INFO L226 Difference]: Without dead ends: 1716 [2022-11-19 06:51:19,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:51:19,942 INFO L413 NwaCegarLoop]: 1476 mSDtfsCounter, 1913 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1913 SdHoareTripleChecker+Valid, 3629 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:19,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1913 Valid, 3629 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:51:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-11-19 06:51:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1373. [2022-11-19 06:51:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1091 states have (on average 1.4207149404216315) internal successors, (1550), 1107 states have internal predecessors, (1550), 211 states have call successors, (211), 71 states have call predecessors, (211), 70 states have return successors, (210), 210 states have call predecessors, (210), 210 states have call successors, (210) [2022-11-19 06:51:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 1971 transitions. [2022-11-19 06:51:20,134 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 1971 transitions. Word has length 82 [2022-11-19 06:51:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:20,135 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 1971 transitions. [2022-11-19 06:51:20,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:51:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 1971 transitions. [2022-11-19 06:51:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 06:51:20,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:20,138 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:20,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-19 06:51:20,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:20,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1529246055, now seen corresponding path program 1 times [2022-11-19 06:51:20,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:20,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251612117] [2022-11-19 06:51:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:20,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:20,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:20,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 06:51:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:20,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:51:20,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-19 06:51:21,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:21,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251612117] [2022-11-19 06:51:21,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251612117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:21,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:21,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:51:21,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403426138] [2022-11-19 06:51:21,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:21,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:51:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:51:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:51:21,328 INFO L87 Difference]: Start difference. First operand 1373 states and 1971 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:51:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:22,057 INFO L93 Difference]: Finished difference Result 4068 states and 5875 transitions. [2022-11-19 06:51:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:51:22,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 82 [2022-11-19 06:51:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:22,079 INFO L225 Difference]: With dead ends: 4068 [2022-11-19 06:51:22,079 INFO L226 Difference]: Without dead ends: 2713 [2022-11-19 06:51:22,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:51:22,091 INFO L413 NwaCegarLoop]: 1188 mSDtfsCounter, 993 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 4549 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:22,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 4549 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:51:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-11-19 06:51:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2705. [2022-11-19 06:51:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2153 states have (on average 1.423130515559684) internal successors, (3064), 2185 states have internal predecessors, (3064), 411 states have call successors, (411), 141 states have call predecessors, (411), 140 states have return successors, (440), 410 states have call predecessors, (440), 410 states have call successors, (440) [2022-11-19 06:51:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 3915 transitions. [2022-11-19 06:51:22,387 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 3915 transitions. Word has length 82 [2022-11-19 06:51:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:22,387 INFO L495 AbstractCegarLoop]: Abstraction has 2705 states and 3915 transitions. [2022-11-19 06:51:22,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 06:51:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 3915 transitions. [2022-11-19 06:51:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-19 06:51:22,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:22,405 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:22,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:22,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:22,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:22,621 INFO L85 PathProgramCache]: Analyzing trace with hash -211321288, now seen corresponding path program 1 times [2022-11-19 06:51:22,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:22,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666275135] [2022-11-19 06:51:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:22,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:22,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:22,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:22,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 06:51:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:51:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-19 06:51:23,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:23,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:23,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666275135] [2022-11-19 06:51:23,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666275135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:23,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:23,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:23,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501659863] [2022-11-19 06:51:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:23,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:23,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:23,295 INFO L87 Difference]: Start difference. First operand 2705 states and 3915 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 06:51:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:23,975 INFO L93 Difference]: Finished difference Result 6693 states and 9691 transitions. [2022-11-19 06:51:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:23,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 140 [2022-11-19 06:51:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:24,003 INFO L225 Difference]: With dead ends: 6693 [2022-11-19 06:51:24,004 INFO L226 Difference]: Without dead ends: 4012 [2022-11-19 06:51:24,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:24,019 INFO L413 NwaCegarLoop]: 1074 mSDtfsCounter, 521 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:24,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2016 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:51:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2022-11-19 06:51:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3999. [2022-11-19 06:51:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3191 states have (on average 1.4302726418050768) internal successors, (4564), 3233 states have internal predecessors, (4564), 595 states have call successors, (595), 213 states have call predecessors, (595), 212 states have return successors, (634), 592 states have call predecessors, (634), 594 states have call successors, (634) [2022-11-19 06:51:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 5793 transitions. [2022-11-19 06:51:24,402 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 5793 transitions. Word has length 140 [2022-11-19 06:51:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:24,403 INFO L495 AbstractCegarLoop]: Abstraction has 3999 states and 5793 transitions. [2022-11-19 06:51:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 06:51:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 5793 transitions. [2022-11-19 06:51:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-19 06:51:24,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:24,417 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:24,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:24,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:24,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 487388931, now seen corresponding path program 1 times [2022-11-19 06:51:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:24,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170061964] [2022-11-19 06:51:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:24,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:24,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 06:51:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:51:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-19 06:51:25,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:25,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:25,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170061964] [2022-11-19 06:51:25,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170061964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:25,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:25,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337315097] [2022-11-19 06:51:25,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:25,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:25,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:25,496 INFO L87 Difference]: Start difference. First operand 3999 states and 5793 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 06:51:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:26,113 INFO L93 Difference]: Finished difference Result 9870 states and 14182 transitions. [2022-11-19 06:51:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 169 [2022-11-19 06:51:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:26,149 INFO L225 Difference]: With dead ends: 9870 [2022-11-19 06:51:26,149 INFO L226 Difference]: Without dead ends: 5895 [2022-11-19 06:51:26,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:26,163 INFO L413 NwaCegarLoop]: 1494 mSDtfsCounter, 662 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 2466 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:26,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 2466 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-11-19 06:51:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 5874. [2022-11-19 06:51:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5874 states, 4711 states have (on average 1.417321163234982) internal successors, (6677), 4777 states have internal predecessors, (6677), 828 states have call successors, (828), 335 states have call predecessors, (828), 334 states have return successors, (889), 825 states have call predecessors, (889), 827 states have call successors, (889) [2022-11-19 06:51:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5874 states to 5874 states and 8394 transitions. [2022-11-19 06:51:26,677 INFO L78 Accepts]: Start accepts. Automaton has 5874 states and 8394 transitions. Word has length 169 [2022-11-19 06:51:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:26,677 INFO L495 AbstractCegarLoop]: Abstraction has 5874 states and 8394 transitions. [2022-11-19 06:51:26,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 06:51:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 5874 states and 8394 transitions. [2022-11-19 06:51:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-19 06:51:26,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:26,691 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:26,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:26,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:26,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1103652056, now seen corresponding path program 1 times [2022-11-19 06:51:26,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:26,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589361166] [2022-11-19 06:51:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:26,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:26,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:26,918 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:26,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-19 06:51:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:51:27,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-19 06:51:27,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:27,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589361166] [2022-11-19 06:51:27,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589361166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:27,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:27,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:27,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619214887] [2022-11-19 06:51:27,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:27,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:27,893 INFO L87 Difference]: Start difference. First operand 5874 states and 8394 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 06:51:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:28,922 INFO L93 Difference]: Finished difference Result 14352 states and 20482 transitions. [2022-11-19 06:51:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 163 [2022-11-19 06:51:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:28,973 INFO L225 Difference]: With dead ends: 14352 [2022-11-19 06:51:28,973 INFO L226 Difference]: Without dead ends: 8513 [2022-11-19 06:51:28,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:28,995 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 718 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:28,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 2096 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:51:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2022-11-19 06:51:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 8500. [2022-11-19 06:51:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8500 states, 6823 states have (on average 1.4103766671552103) internal successors, (9623), 6915 states have internal predecessors, (9623), 1152 states have call successors, (1152), 525 states have call predecessors, (1152), 524 states have return successors, (1241), 1147 states have call predecessors, (1241), 1151 states have call successors, (1241) [2022-11-19 06:51:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8500 states to 8500 states and 12016 transitions. [2022-11-19 06:51:29,875 INFO L78 Accepts]: Start accepts. Automaton has 8500 states and 12016 transitions. Word has length 163 [2022-11-19 06:51:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:29,876 INFO L495 AbstractCegarLoop]: Abstraction has 8500 states and 12016 transitions. [2022-11-19 06:51:29,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 06:51:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 8500 states and 12016 transitions. [2022-11-19 06:51:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-19 06:51:29,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:29,898 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:29,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:30,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:30,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:30,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1411925572, now seen corresponding path program 1 times [2022-11-19 06:51:30,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:30,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900437189] [2022-11-19 06:51:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:30,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:30,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:30,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 06:51:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:30,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:51:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-19 06:51:30,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:30,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900437189] [2022-11-19 06:51:30,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900437189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:30,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:30,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:30,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268112814] [2022-11-19 06:51:30,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:30,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:30,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:30,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:30,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:30,742 INFO L87 Difference]: Start difference. First operand 8500 states and 12016 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 06:51:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:31,345 INFO L93 Difference]: Finished difference Result 12797 states and 18226 transitions. [2022-11-19 06:51:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 168 [2022-11-19 06:51:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:31,399 INFO L225 Difference]: With dead ends: 12797 [2022-11-19 06:51:31,399 INFO L226 Difference]: Without dead ends: 8540 [2022-11-19 06:51:31,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:31,417 INFO L413 NwaCegarLoop]: 1014 mSDtfsCounter, 5 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:31,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2020 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:51:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2022-11-19 06:51:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8540. [2022-11-19 06:51:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8540 states, 6853 states have (on average 1.4085801838610827) internal successors, (9653), 6955 states have internal predecessors, (9653), 1152 states have call successors, (1152), 525 states have call predecessors, (1152), 534 states have return successors, (1251), 1147 states have call predecessors, (1251), 1151 states have call successors, (1251) [2022-11-19 06:51:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8540 states to 8540 states and 12056 transitions. [2022-11-19 06:51:32,119 INFO L78 Accepts]: Start accepts. Automaton has 8540 states and 12056 transitions. Word has length 168 [2022-11-19 06:51:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:32,120 INFO L495 AbstractCegarLoop]: Abstraction has 8540 states and 12056 transitions. [2022-11-19 06:51:32,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 06:51:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8540 states and 12056 transitions. [2022-11-19 06:51:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-19 06:51:32,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:32,139 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:32,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:32,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:32,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1210427941, now seen corresponding path program 1 times [2022-11-19 06:51:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:51:32,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239837056] [2022-11-19 06:51:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:32,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:51:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:51:32,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:51:32,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 06:51:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:33,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:51:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-19 06:51:34,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-19 06:51:37,992 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:51:37,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239837056] [2022-11-19 06:51:37,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239837056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:37,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [166165230] [2022-11-19 06:51:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:37,993 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:51:37,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:51:37,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:51:38,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 06:51:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:39,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:51:39,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-19 06:51:40,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-19 06:51:43,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [166165230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:43,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253728024] [2022-11-19 06:51:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:43,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:43,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:43,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:43,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:51:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:51:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-19 06:51:44,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-19 06:51:48,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253728024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:48,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:51:48,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 9 [2022-11-19 06:51:48,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234489951] [2022-11-19 06:51:48,262 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:48,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:51:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:51:48,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:51:48,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:51:48,264 INFO L87 Difference]: Start difference. First operand 8540 states and 12056 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (29), 7 states have call predecessors, (29), 6 states have call successors, (29) [2022-11-19 06:51:54,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:52:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:10,535 INFO L93 Difference]: Finished difference Result 23714 states and 33983 transitions. [2022-11-19 06:52:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:52:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (29), 7 states have call predecessors, (29), 6 states have call successors, (29) Word has length 170 [2022-11-19 06:52:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:10,608 INFO L225 Difference]: With dead ends: 23714 [2022-11-19 06:52:10,608 INFO L226 Difference]: Without dead ends: 15209 [2022-11-19 06:52:10,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 1010 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:52:10,640 INFO L413 NwaCegarLoop]: 1120 mSDtfsCounter, 5379 mSDsluCounter, 2968 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 1569 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5549 SdHoareTripleChecker+Valid, 4088 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1569 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:10,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5549 Valid, 4088 Invalid, 3943 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1569 Valid, 2373 Invalid, 1 Unknown, 0 Unchecked, 20.7s Time] [2022-11-19 06:52:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15209 states. [2022-11-19 06:52:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15209 to 14808. [2022-11-19 06:52:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14808 states, 11818 states have (on average 1.4102216957183957) internal successors, (16666), 12014 states have internal predecessors, (16666), 2076 states have call successors, (2076), 888 states have call predecessors, (2076), 913 states have return successors, (2321), 2063 states have call predecessors, (2321), 2075 states have call successors, (2321) [2022-11-19 06:52:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14808 states to 14808 states and 21063 transitions. [2022-11-19 06:52:11,903 INFO L78 Accepts]: Start accepts. Automaton has 14808 states and 21063 transitions. Word has length 170 [2022-11-19 06:52:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:11,904 INFO L495 AbstractCegarLoop]: Abstraction has 14808 states and 21063 transitions. [2022-11-19 06:52:11,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (29), 7 states have call predecessors, (29), 6 states have call successors, (29) [2022-11-19 06:52:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 14808 states and 21063 transitions. [2022-11-19 06:52:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-19 06:52:11,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:11,924 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:11,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:12,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:12,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:12,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:12,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:52:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 40671684, now seen corresponding path program 1 times [2022-11-19 06:52:12,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:52:12,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683251806] [2022-11-19 06:52:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:12,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:52:12,540 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:52:12,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 06:52:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:13,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:52:13,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-19 06:52:13,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:52:13,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:52:13,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683251806] [2022-11-19 06:52:13,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683251806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:13,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:13,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:52:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258719954] [2022-11-19 06:52:13,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:13,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:52:13,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:52:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:52:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:52:13,229 INFO L87 Difference]: Start difference. First operand 14808 states and 21063 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 06:52:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:14,887 INFO L93 Difference]: Finished difference Result 34825 states and 49334 transitions. [2022-11-19 06:52:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:52:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 195 [2022-11-19 06:52:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:14,972 INFO L225 Difference]: With dead ends: 34825 [2022-11-19 06:52:14,972 INFO L226 Difference]: Without dead ends: 20052 [2022-11-19 06:52:15,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:52:15,012 INFO L413 NwaCegarLoop]: 1721 mSDtfsCounter, 935 mSDsluCounter, 2500 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 4221 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:15,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 4221 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:52:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20052 states. [2022-11-19 06:52:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20052 to 14832. [2022-11-19 06:52:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14832 states, 11842 states have (on average 1.4093903056916062) internal successors, (16690), 12038 states have internal predecessors, (16690), 2076 states have call successors, (2076), 888 states have call predecessors, (2076), 913 states have return successors, (2321), 2063 states have call predecessors, (2321), 2075 states have call successors, (2321) [2022-11-19 06:52:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14832 states to 14832 states and 21087 transitions. [2022-11-19 06:52:16,210 INFO L78 Accepts]: Start accepts. Automaton has 14832 states and 21087 transitions. Word has length 195 [2022-11-19 06:52:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:16,210 INFO L495 AbstractCegarLoop]: Abstraction has 14832 states and 21087 transitions. [2022-11-19 06:52:16,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 06:52:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14832 states and 21087 transitions. [2022-11-19 06:52:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-19 06:52:16,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:16,231 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:16,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-19 06:52:16,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:16,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:52:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1944018643, now seen corresponding path program 1 times [2022-11-19 06:52:16,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:52:16,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219347311] [2022-11-19 06:52:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:16,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:16,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:52:16,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:52:16,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 06:52:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:52:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-19 06:52:17,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:52:17,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:52:17,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219347311] [2022-11-19 06:52:17,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219347311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:17,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:17,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:52:17,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030981688] [2022-11-19 06:52:17,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:17,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:52:17,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:52:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:52:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:52:17,473 INFO L87 Difference]: Start difference. First operand 14832 states and 21087 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 06:52:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:19,971 INFO L93 Difference]: Finished difference Result 34909 states and 49418 transitions. [2022-11-19 06:52:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:52:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 206 [2022-11-19 06:52:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:20,049 INFO L225 Difference]: With dead ends: 34909 [2022-11-19 06:52:20,050 INFO L226 Difference]: Without dead ends: 20112 [2022-11-19 06:52:20,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:52:20,081 INFO L413 NwaCegarLoop]: 1715 mSDtfsCounter, 1171 mSDsluCounter, 3927 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 5642 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:20,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 5642 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:52:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20112 states. [2022-11-19 06:52:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20112 to 14844. [2022-11-19 06:52:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14844 states, 11854 states have (on average 1.4089758731229964) internal successors, (16702), 12038 states have internal predecessors, (16702), 2076 states have call successors, (2076), 888 states have call predecessors, (2076), 913 states have return successors, (2321), 2063 states have call predecessors, (2321), 2075 states have call successors, (2321) [2022-11-19 06:52:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14844 states to 14844 states and 21099 transitions. [2022-11-19 06:52:21,567 INFO L78 Accepts]: Start accepts. Automaton has 14844 states and 21099 transitions. Word has length 206 [2022-11-19 06:52:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:21,568 INFO L495 AbstractCegarLoop]: Abstraction has 14844 states and 21099 transitions. [2022-11-19 06:52:21,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 06:52:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 14844 states and 21099 transitions. [2022-11-19 06:52:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-19 06:52:21,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:21,587 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:21,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-19 06:52:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:21,810 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:52:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash -651240766, now seen corresponding path program 1 times [2022-11-19 06:52:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:52:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697133696] [2022-11-19 06:52:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:21,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:52:21,814 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:52:21,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 06:52:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:23,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1525 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:52:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-11-19 06:52:23,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:52:23,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:52:23,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697133696] [2022-11-19 06:52:23,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697133696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:23,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:23,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:52:23,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225930014] [2022-11-19 06:52:23,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:23,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:52:23,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:52:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:52:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:52:23,945 INFO L87 Difference]: Start difference. First operand 14844 states and 21099 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 06:52:27,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:52:29,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:52:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:30,799 INFO L93 Difference]: Finished difference Result 32451 states and 46433 transitions. [2022-11-19 06:52:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:52:30,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 244 [2022-11-19 06:52:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:30,872 INFO L225 Difference]: With dead ends: 32451 [2022-11-19 06:52:30,872 INFO L226 Difference]: Without dead ends: 17642 [2022-11-19 06:52:30,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:52:30,911 INFO L413 NwaCegarLoop]: 1348 mSDtfsCounter, 1366 mSDsluCounter, 7034 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 196 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 8382 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:30,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 8382 Invalid, 252 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [196 Valid, 54 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-19 06:52:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17642 states. [2022-11-19 06:52:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17642 to 14928. [2022-11-19 06:52:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14928 states, 11926 states have (on average 1.4065067918832803) internal successors, (16774), 12110 states have internal predecessors, (16774), 2076 states have call successors, (2076), 888 states have call predecessors, (2076), 925 states have return successors, (2333), 2075 states have call predecessors, (2333), 2075 states have call successors, (2333) [2022-11-19 06:52:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14928 states to 14928 states and 21183 transitions. [2022-11-19 06:52:33,010 INFO L78 Accepts]: Start accepts. Automaton has 14928 states and 21183 transitions. Word has length 244 [2022-11-19 06:52:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:33,011 INFO L495 AbstractCegarLoop]: Abstraction has 14928 states and 21183 transitions. [2022-11-19 06:52:33,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 06:52:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 14928 states and 21183 transitions. [2022-11-19 06:52:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-19 06:52:33,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:33,029 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:33,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:33,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:33,253 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:52:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash 727605963, now seen corresponding path program 1 times [2022-11-19 06:52:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:52:33,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766665065] [2022-11-19 06:52:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:33,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:52:33,259 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:52:33,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 06:52:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:52:35,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 65 proven. 14 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-19 06:52:37,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-11-19 06:52:40,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:52:40,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766665065] [2022-11-19 06:52:40,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766665065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:52:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [550967014] [2022-11-19 06:52:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:40,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:52:40,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:52:40,345 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:52:40,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-19 06:52:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:52:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-11-19 06:52:42,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:52:42,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [550967014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:42,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:52:42,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 17 [2022-11-19 06:52:42,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640360120] [2022-11-19 06:52:42,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:42,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:52:42,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:52:42,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:52:42,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:52:42,575 INFO L87 Difference]: Start difference. First operand 14928 states and 21183 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-19 06:52:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:45,328 INFO L93 Difference]: Finished difference Result 34106 states and 49063 transitions. [2022-11-19 06:52:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:52:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 250 [2022-11-19 06:52:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:45,408 INFO L225 Difference]: With dead ends: 34106 [2022-11-19 06:52:45,409 INFO L226 Difference]: Without dead ends: 19213 [2022-11-19 06:52:45,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:52:45,449 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 280 mSDsluCounter, 5180 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:45,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 6560 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:52:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19213 states. [2022-11-19 06:52:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19213 to 15000. [2022-11-19 06:52:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15000 states, 11986 states have (on average 1.4044718838645085) internal successors, (16834), 12170 states have internal predecessors, (16834), 2076 states have call successors, (2076), 888 states have call predecessors, (2076), 937 states have return successors, (2369), 2087 states have call predecessors, (2369), 2075 states have call successors, (2369) [2022-11-19 06:52:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15000 states to 15000 states and 21279 transitions. [2022-11-19 06:52:47,598 INFO L78 Accepts]: Start accepts. Automaton has 15000 states and 21279 transitions. Word has length 250 [2022-11-19 06:52:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:47,599 INFO L495 AbstractCegarLoop]: Abstraction has 15000 states and 21279 transitions. [2022-11-19 06:52:47,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-19 06:52:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15000 states and 21279 transitions. [2022-11-19 06:52:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-19 06:52:47,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:47,618 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:47,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:47,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-19 06:52:48,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:48,061 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:52:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:48,062 INFO L85 PathProgramCache]: Analyzing trace with hash -268704246, now seen corresponding path program 1 times [2022-11-19 06:52:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:52:48,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435194803] [2022-11-19 06:52:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:48,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:52:48,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:52:48,069 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:52:48,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 06:52:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:52:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 65 proven. 14 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-19 06:52:52,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-11-19 06:52:54,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:52:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435194803] [2022-11-19 06:52:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435194803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:52:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094020083] [2022-11-19 06:52:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:54,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:52:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:52:54,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:52:54,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-19 06:52:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:52:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 65 proven. 14 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-19 06:52:58,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-11-19 06:53:00,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2094020083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868943954] [2022-11-19 06:53:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:00,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:00,329 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:00,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1689fdde-25d3-45e1-add7-367d5a716e02/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 06:53:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:53:01,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 120 proven. 35 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-19 06:53:03,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-19 06:53:05,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868943954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:05,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:53:05,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 4, 4] total 17 [2022-11-19 06:53:05,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113972569] [2022-11-19 06:53:05,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:05,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:53:05,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:53:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:53:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:53:05,193 INFO L87 Difference]: Start difference. First operand 15000 states and 21279 transitions. Second operand has 17 states, 17 states have (on average 27.764705882352942) internal successors, (472), 15 states have internal predecessors, (472), 10 states have call successors, (81), 4 states have call predecessors, (81), 6 states have return successors, (82), 12 states have call predecessors, (82), 10 states have call successors, (82) [2022-11-19 06:54:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:40,884 INFO L93 Difference]: Finished difference Result 150005 states and 221713 transitions. [2022-11-19 06:54:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 06:54:40,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 27.764705882352942) internal successors, (472), 15 states have internal predecessors, (472), 10 states have call successors, (81), 4 states have call predecessors, (81), 6 states have return successors, (82), 12 states have call predecessors, (82), 10 states have call successors, (82) Word has length 251 [2022-11-19 06:54:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:41,521 INFO L225 Difference]: With dead ends: 150005 [2022-11-19 06:54:41,522 INFO L226 Difference]: Without dead ends: 135040 [2022-11-19 06:54:41,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1542 GetRequests, 1487 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=504, Invalid=2688, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:54:41,594 INFO L413 NwaCegarLoop]: 3108 mSDtfsCounter, 18133 mSDsluCounter, 33330 mSDsCounter, 0 mSdLazyCounter, 9785 mSolverCounterSat, 3719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18245 SdHoareTripleChecker+Valid, 36438 SdHoareTripleChecker+Invalid, 13504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 3719 IncrementalHoareTripleChecker+Valid, 9785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:41,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18245 Valid, 36438 Invalid, 13504 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [3719 Valid, 9785 Invalid, 0 Unknown, 0 Unchecked, 72.2s Time] [2022-11-19 06:54:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135040 states.