./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.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_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/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_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/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_367ac7b0-783e-4358-8434-610900ef570a/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 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae --- 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 07:29:48,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:29:48,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:29:48,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:29:48,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:29:48,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:29:48,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:29:48,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:29:48,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:29:48,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:29:48,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:29:48,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:29:48,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:29:48,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:29:48,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:29:48,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:29:48,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:29:48,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:29:48,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:29:48,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:29:48,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:29:48,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:29:48,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:29:48,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:29:48,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:29:48,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:29:48,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:29:48,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:29:48,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:29:48,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:29:48,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:29:48,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:29:48,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:29:48,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:29:48,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:29:48,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:29:48,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:29:48,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:29:48,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:29:48,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:29:48,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:29:48,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:29:48,695 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:29:48,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:29:48,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:29:48,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:29:48,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:29:48,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:29:48,698 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:29:48,698 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:29:48,698 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:29:48,698 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:29:48,699 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:29:48,700 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:29:48,700 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:29:48,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:29:48,700 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:29:48,701 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:29:48,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:29:48,701 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:29:48,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:29:48,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:29:48,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:29:48,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:29:48,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:29:48,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:29:48,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:29:48,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:29:48,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:29:48,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:29:48,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:29:48,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:48,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:29:48,706 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:29:48,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:29:48,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:29:48,707 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:29:48,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:29:48,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:29:48,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:29:48,707 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_367ac7b0-783e-4358-8434-610900ef570a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae [2022-11-19 07:29:48,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:29:49,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:29:49,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:29:49,016 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:29:49,016 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:29:49,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2022-11-19 07:29:49,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/data/4616ab2ec/74affbbe043a4c22b6108c9472590af7/FLAG46c493bbc [2022-11-19 07:29:49,984 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:29:49,984 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2022-11-19 07:29:50,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/data/4616ab2ec/74affbbe043a4c22b6108c9472590af7/FLAG46c493bbc [2022-11-19 07:29:50,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/data/4616ab2ec/74affbbe043a4c22b6108c9472590af7 [2022-11-19 07:29:50,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:29:50,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:29:50,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:50,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:29:50,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:29:50,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:50" (1/1) ... [2022-11-19 07:29:50,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36176ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:50, skipping insertion in model container [2022-11-19 07:29:50,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:50" (1/1) ... [2022-11-19 07:29:50,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:29:50,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:29:52,622 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_367ac7b0-783e-4358-8434-610900ef570a/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2022-11-19 07:29:52,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:52,776 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:29:53,308 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_367ac7b0-783e-4358-8434-610900ef570a/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2022-11-19 07:29:53,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:53,419 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:29:53,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53 WrapperNode [2022-11-19 07:29:53,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:53,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:53,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:29:53,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:29:53,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:53,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:53,805 INFO L138 Inliner]: procedures = 282, calls = 3122, calls flagged for inlining = 129, calls inlined = 120, statements flattened = 6850 [2022-11-19 07:29:53,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:53,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:29:53,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:29:53,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:29:53,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:53,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:53,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:53,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:54,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:54,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:54,191 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:54,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:54,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:29:54,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:29:54,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:29:54,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:29:54,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (1/1) ... [2022-11-19 07:29:54,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:54,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:54,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:29:54,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:29:54,399 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-11-19 07:29:54,399 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2022-11-19 07:29:54,399 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2022-11-19 07:29:54,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:29:54,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:29:54,400 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2022-11-19 07:29:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2022-11-19 07:29:54,400 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2022-11-19 07:29:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2022-11-19 07:29:54,400 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-19 07:29:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-19 07:29:54,401 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2022-11-19 07:29:54,401 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2022-11-19 07:29:54,401 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-19 07:29:54,401 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-19 07:29:54,401 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-19 07:29:54,401 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-19 07:29:54,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:29:54,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:29:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2022-11-19 07:29:54,402 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2022-11-19 07:29:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 07:29:54,402 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 07:29:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:29:54,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:29:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2022-11-19 07:29:54,403 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2022-11-19 07:29:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-19 07:29:54,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-19 07:29:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 07:29:54,403 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 07:29:54,404 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2022-11-19 07:29:54,404 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2022-11-19 07:29:54,404 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2022-11-19 07:29:54,404 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2022-11-19 07:29:54,404 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2022-11-19 07:29:54,405 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2022-11-19 07:29:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-19 07:29:54,405 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-19 07:29:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_ioctl [2022-11-19 07:29:54,405 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_ioctl [2022-11-19 07:29:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:29:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_st_ref_mutex [2022-11-19 07:29:54,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_st_ref_mutex [2022-11-19 07:29:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2022-11-19 07:29:54,406 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2022-11-19 07:29:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2022-11-19 07:29:54,407 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2022-11-19 07:29:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:29:54,408 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2022-11-19 07:29:54,408 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2022-11-19 07:29:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2022-11-19 07:29:54,409 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2022-11-19 07:29:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-19 07:29:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-19 07:29:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-19 07:29:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-19 07:29:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-19 07:29:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2022-11-19 07:29:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2022-11-19 07:29:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:29:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2022-11-19 07:29:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2022-11-19 07:29:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:29:54,411 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2022-11-19 07:29:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2022-11-19 07:29:54,412 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-19 07:29:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-19 07:29:54,412 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-19 07:29:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-19 07:29:54,412 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2022-11-19 07:29:54,413 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2022-11-19 07:29:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2022-11-19 07:29:54,413 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2022-11-19 07:29:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2022-11-19 07:29:54,414 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2022-11-19 07:29:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-19 07:29:54,414 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-19 07:29:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 07:29:54,414 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 07:29:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:29:54,415 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:29:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2022-11-19 07:29:54,415 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2022-11-19 07:29:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 07:29:54,416 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 07:29:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-19 07:29:54,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-19 07:29:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2022-11-19 07:29:54,417 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2022-11-19 07:29:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_scsi_tape [2022-11-19 07:29:54,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_scsi_tape [2022-11-19 07:29:54,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:29:54,418 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-19 07:29:54,419 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-19 07:29:54,419 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2022-11-19 07:29:54,419 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2022-11-19 07:29:54,419 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-19 07:29:54,419 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-19 07:29:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2022-11-19 07:29:54,420 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2022-11-19 07:29:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:29:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2022-11-19 07:29:54,420 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2022-11-19 07:29:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:29:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2022-11-19 07:29:54,421 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2022-11-19 07:29:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2022-11-19 07:29:54,421 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2022-11-19 07:29:54,422 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2022-11-19 07:29:54,422 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2022-11-19 07:29:54,425 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2022-11-19 07:29:54,425 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2022-11-19 07:29:54,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:29:54,425 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:29:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2022-11-19 07:29:54,427 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2022-11-19 07:29:54,429 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2022-11-19 07:29:54,429 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2022-11-19 07:29:54,429 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2022-11-19 07:29:54,434 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2022-11-19 07:29:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2022-11-19 07:29:54,434 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2022-11-19 07:29:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:29:54,435 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:29:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2022-11-19 07:29:54,435 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2022-11-19 07:29:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:29:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-19 07:29:54,435 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-19 07:29:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-19 07:29:54,436 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-19 07:29:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:29:54,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:29:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_st_ref_mutex [2022-11-19 07:29:54,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_st_ref_mutex [2022-11-19 07:29:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:29:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-19 07:29:54,436 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-19 07:29:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:29:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2022-11-19 07:29:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2022-11-19 07:29:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2022-11-19 07:29:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2022-11-19 07:29:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:29:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:29:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2022-11-19 07:29:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2022-11-19 07:29:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2022-11-19 07:29:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2022-11-19 07:29:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2022-11-19 07:29:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2022-11-19 07:29:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2022-11-19 07:29:54,438 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2022-11-19 07:29:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2022-11-19 07:29:54,439 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2022-11-19 07:29:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 07:29:54,439 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 07:29:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2022-11-19 07:29:54,439 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2022-11-19 07:29:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-11-19 07:29:54,440 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-11-19 07:29:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2022-11-19 07:29:54,440 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2022-11-19 07:29:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2022-11-19 07:29:54,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2022-11-19 07:29:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 07:29:54,440 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 07:29:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:29:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2022-11-19 07:29:54,441 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2022-11-19 07:29:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2022-11-19 07:29:54,441 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2022-11-19 07:29:54,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:29:54,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:29:55,446 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:29:55,450 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:30:05,411 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:30:10,203 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:30:10,203 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:30:10,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:30:10 BoogieIcfgContainer [2022-11-19 07:30:10,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:30:10,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:30:10,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:30:10,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:30:10,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:29:50" (1/3) ... [2022-11-19 07:30:10,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a48802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:30:10, skipping insertion in model container [2022-11-19 07:30:10,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:53" (2/3) ... [2022-11-19 07:30:10,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a48802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:30:10, skipping insertion in model container [2022-11-19 07:30:10,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:30:10" (3/3) ... [2022-11-19 07:30:10,217 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2022-11-19 07:30:10,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:30:10,237 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:30:10,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:30:10,337 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;@6ce6f14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:30:10,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:30:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 1330 states, 905 states have (on average 1.4430939226519337) internal successors, (1306), 927 states have internal predecessors, (1306), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) [2022-11-19 07:30:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:30:10,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:10,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:10,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash 709513286, now seen corresponding path program 1 times [2022-11-19 07:30:10,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:10,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302985548] [2022-11-19 07:30:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:10,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302985548] [2022-11-19 07:30:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302985548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:30:10,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:30:10,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:30:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075095815] [2022-11-19 07:30:10,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:10,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:30:10,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:30:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:30:11,035 INFO L87 Difference]: Start difference. First operand has 1330 states, 905 states have (on average 1.4430939226519337) internal successors, (1306), 927 states have internal predecessors, (1306), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:30:13,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:15,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:17,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:21,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:23,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:30:30,521 WARN L539 Checker$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 07:30:34,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:30:36,531 WARN L539 Checker$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 07:30:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:38,335 INFO L93 Difference]: Finished difference Result 3841 states and 5803 transitions. [2022-11-19 07:30:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:30:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-19 07:30:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:38,371 INFO L225 Difference]: With dead ends: 3841 [2022-11-19 07:30:38,371 INFO L226 Difference]: Without dead ends: 2541 [2022-11-19 07:30:38,386 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 07:30:38,389 INFO L413 NwaCegarLoop]: 2046 mSDtfsCounter, 1858 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 3669 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:38,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1872 Valid, 3669 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 611 Invalid, 6 Unknown, 0 Unchecked, 26.9s Time] [2022-11-19 07:30:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2022-11-19 07:30:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2533. [2022-11-19 07:30:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 1734 states have (on average 1.4440599769319493) internal successors, (2504), 1763 states have internal predecessors, (2504), 646 states have call successors, (646), 153 states have call predecessors, (646), 152 states have return successors, (652), 637 states have call predecessors, (652), 638 states have call successors, (652) [2022-11-19 07:30:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3802 transitions. [2022-11-19 07:30:38,661 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3802 transitions. Word has length 12 [2022-11-19 07:30:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:38,662 INFO L495 AbstractCegarLoop]: Abstraction has 2533 states and 3802 transitions. [2022-11-19 07:30:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:30:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3802 transitions. [2022-11-19 07:30:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:30:38,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:38,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:38,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:30:38,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash 519360281, now seen corresponding path program 1 times [2022-11-19 07:30:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:38,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647240978] [2022-11-19 07:30:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:38,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:30:38,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647240978] [2022-11-19 07:30:38,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647240978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:30:38,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:30:38,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:30:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678934649] [2022-11-19 07:30:38,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:38,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:30:38,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:30:38,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:30:38,976 INFO L87 Difference]: Start difference. First operand 2533 states and 3802 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:30:40,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:41,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:43,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:44,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:46,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:48,605 WARN L539 Checker$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 07:30:53,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:55,539 WARN L539 Checker$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 07:30:57,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:31:01,059 WARN L539 Checker$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 07:31:03,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:05,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:31:08,311 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 07:31:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:09,424 INFO L93 Difference]: Finished difference Result 3976 states and 5906 transitions. [2022-11-19 07:31:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:31:09,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-19 07:31:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:09,458 INFO L225 Difference]: With dead ends: 3976 [2022-11-19 07:31:09,458 INFO L226 Difference]: Without dead ends: 3972 [2022-11-19 07:31:09,463 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 07:31:09,464 INFO L413 NwaCegarLoop]: 2060 mSDtfsCounter, 1143 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 4 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 3650 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:09,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 3650 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 641 Invalid, 8 Unknown, 0 Unchecked, 30.2s Time] [2022-11-19 07:31:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2022-11-19 07:31:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 3959. [2022-11-19 07:31:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3959 states, 2664 states have (on average 1.4275525525525525) internal successors, (3803), 2717 states have internal predecessors, (3803), 1027 states have call successors, (1027), 270 states have call predecessors, (1027), 267 states have return successors, (1058), 1006 states have call predecessors, (1058), 1019 states have call successors, (1058) [2022-11-19 07:31:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3959 states to 3959 states and 5888 transitions. [2022-11-19 07:31:09,786 INFO L78 Accepts]: Start accepts. Automaton has 3959 states and 5888 transitions. Word has length 13 [2022-11-19 07:31:09,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:09,786 INFO L495 AbstractCegarLoop]: Abstraction has 3959 states and 5888 transitions. [2022-11-19 07:31:09,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:31:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3959 states and 5888 transitions. [2022-11-19 07:31:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:31:09,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:09,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:31:09,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1080410711, now seen corresponding path program 1 times [2022-11-19 07:31:09,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:09,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458192824] [2022-11-19 07:31:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:10,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:10,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458192824] [2022-11-19 07:31:10,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458192824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:10,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:10,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:31:10,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532981226] [2022-11-19 07:31:10,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:10,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:31:10,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:10,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:31:10,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:31:10,031 INFO L87 Difference]: Start difference. First operand 3959 states and 5888 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:31:12,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:14,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:17,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:20,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:31:24,492 WARN L539 Checker$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 07:31:25,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:31:27,645 WARN L539 Checker$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 07:31:30,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:34,753 WARN L539 Checker$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 07:31:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:35,848 INFO L93 Difference]: Finished difference Result 5987 states and 8888 transitions. [2022-11-19 07:31:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:31:35,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-19 07:31:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:35,889 INFO L225 Difference]: With dead ends: 5987 [2022-11-19 07:31:35,890 INFO L226 Difference]: Without dead ends: 5984 [2022-11-19 07:31:35,895 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 07:31:35,896 INFO L413 NwaCegarLoop]: 2028 mSDtfsCounter, 1891 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:35,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1891 Valid, 3657 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 603 Invalid, 5 Unknown, 0 Unchecked, 25.6s Time] [2022-11-19 07:31:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5984 states. [2022-11-19 07:31:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5984 to 5972. [2022-11-19 07:31:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 4027 states have (on average 1.4273652843307674) internal successors, (5748), 4101 states have internal predecessors, (5748), 1533 states have call successors, (1533), 415 states have call predecessors, (1533), 411 states have return successors, (1572), 1505 states have call predecessors, (1572), 1525 states have call successors, (1572) [2022-11-19 07:31:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 8853 transitions. [2022-11-19 07:31:36,303 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 8853 transitions. Word has length 14 [2022-11-19 07:31:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:36,303 INFO L495 AbstractCegarLoop]: Abstraction has 5972 states and 8853 transitions. [2022-11-19 07:31:36,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:31:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 8853 transitions. [2022-11-19 07:31:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:31:36,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:36,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:36,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:31:36,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash 866300956, now seen corresponding path program 1 times [2022-11-19 07:31:36,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:36,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698231827] [2022-11-19 07:31:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:36,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:36,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698231827] [2022-11-19 07:31:36,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698231827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:36,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:36,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:31:36,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592816721] [2022-11-19 07:31:36,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:36,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:31:36,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:31:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:31:36,583 INFO L87 Difference]: Start difference. First operand 5972 states and 8853 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:31:40,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:43,387 WARN L539 Checker$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 07:31:46,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:31:50,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:31:53,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:54,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:56,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:31:59,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:01,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:02,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:04,909 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 07:32:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:06,719 INFO L93 Difference]: Finished difference Result 8188 states and 12152 transitions. [2022-11-19 07:32:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:32:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-19 07:32:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:06,774 INFO L225 Difference]: With dead ends: 8188 [2022-11-19 07:32:06,774 INFO L226 Difference]: Without dead ends: 8168 [2022-11-19 07:32:06,783 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 07:32:06,784 INFO L413 NwaCegarLoop]: 1968 mSDtfsCounter, 1770 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:06,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1784 Valid, 3518 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 610 Invalid, 6 Unknown, 0 Unchecked, 29.9s Time] [2022-11-19 07:32:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8168 states. [2022-11-19 07:32:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8168 to 8160. [2022-11-19 07:32:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 5540 states have (on average 1.4308664259927797) internal successors, (7927), 5643 states have internal predecessors, (7927), 2016 states have call successors, (2016), 612 states have call predecessors, (2016), 603 states have return successors, (2161), 1967 states have call predecessors, (2161), 2008 states have call successors, (2161) [2022-11-19 07:32:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 12104 transitions. [2022-11-19 07:32:07,284 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 12104 transitions. Word has length 15 [2022-11-19 07:32:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:07,286 INFO L495 AbstractCegarLoop]: Abstraction has 8160 states and 12104 transitions. [2022-11-19 07:32:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:32:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 12104 transitions. [2022-11-19 07:32:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:32:07,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:07,298 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:32:07,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:32:07,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2057663856, now seen corresponding path program 1 times [2022-11-19 07:32:07,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:07,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536704304] [2022-11-19 07:32:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:07,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:07,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536704304] [2022-11-19 07:32:07,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536704304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:07,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:07,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:32:07,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339077625] [2022-11-19 07:32:07,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:07,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:07,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:32:07,685 INFO L87 Difference]: Start difference. First operand 8160 states and 12104 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:32:09,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:15,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:20,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:32:25,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:27,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:32:30,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:32,055 WARN L539 Checker$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 07:32:34,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:36,656 WARN L539 Checker$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 07:32:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:38,248 INFO L93 Difference]: Finished difference Result 16282 states and 24156 transitions. [2022-11-19 07:32:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-11-19 07:32:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:38,295 INFO L225 Difference]: With dead ends: 16282 [2022-11-19 07:32:38,295 INFO L226 Difference]: Without dead ends: 8160 [2022-11-19 07:32:38,332 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 07:32:38,333 INFO L413 NwaCegarLoop]: 1677 mSDtfsCounter, 1 mSDsluCounter, 3350 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5027 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:38,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5027 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 909 Invalid, 5 Unknown, 0 Unchecked, 30.2s Time] [2022-11-19 07:32:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2022-11-19 07:32:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 8160. [2022-11-19 07:32:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 5540 states have (on average 1.4306859205776172) internal successors, (7926), 5643 states have internal predecessors, (7926), 2016 states have call successors, (2016), 612 states have call predecessors, (2016), 603 states have return successors, (2161), 1967 states have call predecessors, (2161), 2008 states have call successors, (2161) [2022-11-19 07:32:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 12103 transitions. [2022-11-19 07:32:38,720 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 12103 transitions. Word has length 47 [2022-11-19 07:32:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:38,720 INFO L495 AbstractCegarLoop]: Abstraction has 8160 states and 12103 transitions. [2022-11-19 07:32:38,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:32:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 12103 transitions. [2022-11-19 07:32:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 07:32:38,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:38,726 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:32:38,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:32:38,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:38,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1255681949, now seen corresponding path program 1 times [2022-11-19 07:32:38,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:38,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137835890] [2022-11-19 07:32:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:38,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:39,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:39,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137835890] [2022-11-19 07:32:39,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137835890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:39,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:39,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:32:39,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986737447] [2022-11-19 07:32:39,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:39,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:32:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:32:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:32:39,557 INFO L87 Difference]: Start difference. First operand 8160 states and 12103 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:32:41,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:43,928 WARN L539 Checker$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 07:32:45,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:48,914 WARN L539 Checker$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 07:32:50,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:52,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:55,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:59,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:01,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:03,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:05,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:08,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:09,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:13,134 WARN L539 Checker$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 07:33:15,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:17,729 WARN L539 Checker$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 07:33:28,842 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 07:33:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:31,907 INFO L93 Difference]: Finished difference Result 10949 states and 16241 transitions. [2022-11-19 07:33:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:33:31,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 52 [2022-11-19 07:33:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:31,962 INFO L225 Difference]: With dead ends: 10949 [2022-11-19 07:33:31,962 INFO L226 Difference]: Without dead ends: 10946 [2022-11-19 07:33:31,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:33:31,969 INFO L413 NwaCegarLoop]: 2420 mSDtfsCounter, 2765 mSDsluCounter, 4734 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 756 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2857 SdHoareTripleChecker+Valid, 7154 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:31,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2857 Valid, 7154 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 1806 Invalid, 11 Unknown, 0 Unchecked, 51.9s Time] [2022-11-19 07:33:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10946 states. [2022-11-19 07:33:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10946 to 10009. [2022-11-19 07:33:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 6806 states have (on average 1.4256538348516015) internal successors, (9703), 6918 states have internal predecessors, (9703), 2415 states have call successors, (2415), 800 states have call predecessors, (2415), 787 states have return successors, (2592), 2362 states have call predecessors, (2592), 2407 states have call successors, (2592) [2022-11-19 07:33:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 14710 transitions. [2022-11-19 07:33:32,457 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 14710 transitions. Word has length 52 [2022-11-19 07:33:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:32,459 INFO L495 AbstractCegarLoop]: Abstraction has 10009 states and 14710 transitions. [2022-11-19 07:33:32,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:33:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 14710 transitions. [2022-11-19 07:33:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:33:32,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:32,463 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:33:32,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:33:32,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash 389614768, now seen corresponding path program 1 times [2022-11-19 07:33:32,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:32,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802764446] [2022-11-19 07:33:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:32,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:33:32,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:32,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802764446] [2022-11-19 07:33:32,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802764446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:32,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:33:32,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:33:32,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37963891] [2022-11-19 07:33:32,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:32,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:33:32,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:33:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:33:32,705 INFO L87 Difference]: Start difference. First operand 10009 states and 14710 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:33:35,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:37,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:40,037 WARN L539 Checker$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 07:33:42,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:45,085 WARN L539 Checker$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 07:33:48,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:50,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:33:52,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:54,954 WARN L539 Checker$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 07:33:58,238 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 07:33:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:59,973 INFO L93 Difference]: Finished difference Result 21360 states and 31679 transitions. [2022-11-19 07:33:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:33:59,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2022-11-19 07:33:59,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:00,039 INFO L225 Difference]: With dead ends: 21360 [2022-11-19 07:34:00,040 INFO L226 Difference]: Without dead ends: 11391 [2022-11-19 07:34:00,092 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 07:34:00,093 INFO L413 NwaCegarLoop]: 1759 mSDtfsCounter, 420 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 3295 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:00,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 3295 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 604 Invalid, 6 Unknown, 0 Unchecked, 26.9s Time] [2022-11-19 07:34:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2022-11-19 07:34:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 11284. [2022-11-19 07:34:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 7733 states have (on average 1.434889434889435) internal successors, (11096), 7860 states have internal predecessors, (11096), 2763 states have call successors, (2763), 800 states have call predecessors, (2763), 787 states have return successors, (2966), 2707 states have call predecessors, (2966), 2755 states have call successors, (2966) [2022-11-19 07:34:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 16825 transitions. [2022-11-19 07:34:00,626 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 16825 transitions. Word has length 55 [2022-11-19 07:34:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:00,627 INFO L495 AbstractCegarLoop]: Abstraction has 11284 states and 16825 transitions. [2022-11-19 07:34:00,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:34:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 16825 transitions. [2022-11-19 07:34:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:34:00,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:00,631 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:34:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:34:00,632 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash -751054982, now seen corresponding path program 1 times [2022-11-19 07:34:00,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380606427] [2022-11-19 07:34:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:34:01,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:01,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380606427] [2022-11-19 07:34:01,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380606427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:01,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:01,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:01,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977359669] [2022-11-19 07:34:01,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:01,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:01,151 INFO L87 Difference]: Start difference. First operand 11284 states and 16825 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:34:04,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:34:07,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:09,082 WARN L539 Checker$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 07:34:11,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:13,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:16,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:20,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:34:23,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:27,519 WARN L539 Checker$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 07:34:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:29,698 INFO L93 Difference]: Finished difference Result 11354 states and 16864 transitions. [2022-11-19 07:34:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:29,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2022-11-19 07:34:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:29,763 INFO L225 Difference]: With dead ends: 11354 [2022-11-19 07:34:29,764 INFO L226 Difference]: Without dead ends: 11351 [2022-11-19 07:34:29,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:34:29,774 INFO L413 NwaCegarLoop]: 1676 mSDtfsCounter, 110 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 3244 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:29,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 3244 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 600 Invalid, 6 Unknown, 0 Unchecked, 28.3s Time] [2022-11-19 07:34:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11351 states. [2022-11-19 07:34:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11351 to 11351. [2022-11-19 07:34:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11351 states, 7769 states have (on average 1.4323593770111984) internal successors, (11128), 7895 states have internal predecessors, (11128), 2762 states have call successors, (2762), 832 states have call predecessors, (2762), 819 states have return successors, (2966), 2707 states have call predecessors, (2966), 2755 states have call successors, (2966) [2022-11-19 07:34:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11351 states to 11351 states and 16856 transitions. [2022-11-19 07:34:30,253 INFO L78 Accepts]: Start accepts. Automaton has 11351 states and 16856 transitions. Word has length 66 [2022-11-19 07:34:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:30,254 INFO L495 AbstractCegarLoop]: Abstraction has 11351 states and 16856 transitions. [2022-11-19 07:34:30,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:34:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 11351 states and 16856 transitions. [2022-11-19 07:34:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 07:34:30,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:30,258 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:34:30,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 150541467, now seen corresponding path program 1 times [2022-11-19 07:34:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432246726] [2022-11-19 07:34:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:34:30,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:30,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432246726] [2022-11-19 07:34:30,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432246726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:30,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:30,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:34:30,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934470483] [2022-11-19 07:34:30,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:30,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:34:30,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:30,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:34:30,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:30,958 INFO L87 Difference]: Start difference. First operand 11351 states and 16856 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:34:34,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:35,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:38,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:34:41,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:43,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:45,042 WARN L539 Checker$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 07:34:47,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:50,142 WARN L539 Checker$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 07:34:53,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:56,055 WARN L539 Checker$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 07:35:01,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:35:02,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:35:04,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:35:08,937 WARN L539 Checker$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 07:35:13,634 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 07:35:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:16,962 INFO L93 Difference]: Finished difference Result 22664 states and 33661 transitions. [2022-11-19 07:35:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:35:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2022-11-19 07:35:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:17,027 INFO L225 Difference]: With dead ends: 22664 [2022-11-19 07:35:17,027 INFO L226 Difference]: Without dead ends: 11341 [2022-11-19 07:35:17,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:35:17,077 INFO L413 NwaCegarLoop]: 1673 mSDtfsCounter, 3 mSDsluCounter, 5009 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 2 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6682 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:17,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6682 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1215 Invalid, 10 Unknown, 0 Unchecked, 45.6s Time] [2022-11-19 07:35:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2022-11-19 07:35:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 11341. [2022-11-19 07:35:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11341 states, 7765 states have (on average 1.4321957501609788) internal successors, (11121), 7889 states have internal predecessors, (11121), 2759 states have call successors, (2759), 829 states have call predecessors, (2759), 816 states have return successors, (2963), 2704 states have call predecessors, (2963), 2752 states have call successors, (2963) [2022-11-19 07:35:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11341 states to 11341 states and 16843 transitions. [2022-11-19 07:35:17,814 INFO L78 Accepts]: Start accepts. Automaton has 11341 states and 16843 transitions. Word has length 68 [2022-11-19 07:35:17,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:17,816 INFO L495 AbstractCegarLoop]: Abstraction has 11341 states and 16843 transitions. [2022-11-19 07:35:17,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:35:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 11341 states and 16843 transitions. [2022-11-19 07:35:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:35:17,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:17,819 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:17,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:35:17,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1113783623, now seen corresponding path program 1 times [2022-11-19 07:35:17,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:17,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247065057] [2022-11-19 07:35:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:17,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:35:18,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:18,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247065057] [2022-11-19 07:35:18,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247065057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:18,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:18,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:35:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696567067] [2022-11-19 07:35:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:35:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:35:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:35:18,305 INFO L87 Difference]: Start difference. First operand 11341 states and 16843 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:35:20,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:23,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:25,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:35:28,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:30,401 WARN L539 Checker$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 07:35:35,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:38,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:35:40,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:35:42,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:35:45,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:49,737 WARN L539 Checker$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 07:35:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:51,784 INFO L93 Difference]: Finished difference Result 22656 states and 33650 transitions. [2022-11-19 07:35:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:35:51,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 72 [2022-11-19 07:35:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:51,934 INFO L225 Difference]: With dead ends: 22656 [2022-11-19 07:35:51,934 INFO L226 Difference]: Without dead ends: 11341 [2022-11-19 07:35:51,967 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 07:35:51,968 INFO L413 NwaCegarLoop]: 1664 mSDtfsCounter, 1 mSDsluCounter, 3322 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4986 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:51,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4986 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 908 Invalid, 8 Unknown, 0 Unchecked, 33.1s Time] [2022-11-19 07:35:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2022-11-19 07:35:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 11341. [2022-11-19 07:35:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11341 states, 7765 states have (on average 1.4320669671603348) internal successors, (11120), 7889 states have internal predecessors, (11120), 2759 states have call successors, (2759), 829 states have call predecessors, (2759), 816 states have return successors, (2963), 2704 states have call predecessors, (2963), 2752 states have call successors, (2963) [2022-11-19 07:35:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11341 states to 11341 states and 16842 transitions. [2022-11-19 07:35:52,466 INFO L78 Accepts]: Start accepts. Automaton has 11341 states and 16842 transitions. Word has length 72 [2022-11-19 07:35:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:52,466 INFO L495 AbstractCegarLoop]: Abstraction has 11341 states and 16842 transitions. [2022-11-19 07:35:52,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:35:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 11341 states and 16842 transitions. [2022-11-19 07:35:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 07:35:52,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:52,473 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:52,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:35:52,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:52,474 INFO L85 PathProgramCache]: Analyzing trace with hash -607622917, now seen corresponding path program 1 times [2022-11-19 07:35:52,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:52,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062080293] [2022-11-19 07:35:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:52,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:35:53,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:53,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062080293] [2022-11-19 07:35:53,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062080293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:53,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:53,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:35:53,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998524868] [2022-11-19 07:35:53,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:53,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:35:53,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:53,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:35:53,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:35:53,039 INFO L87 Difference]: Start difference. First operand 11341 states and 16842 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 07:35:57,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:36:00,752 WARN L539 Checker$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 07:36:03,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:05,689 WARN L539 Checker$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 07:36:06,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:09,245 WARN L539 Checker$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 07:36:11,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:17,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:36:19,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:36:22,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:24,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:26,586 WARN L539 Checker$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 07:36:31,768 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 07:36:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:34,970 INFO L93 Difference]: Finished difference Result 22656 states and 33649 transitions. [2022-11-19 07:36:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:36:34,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-11-19 07:36:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:35,013 INFO L225 Difference]: With dead ends: 22656 [2022-11-19 07:36:35,013 INFO L226 Difference]: Without dead ends: 11335 [2022-11-19 07:36:35,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:36:35,051 INFO L413 NwaCegarLoop]: 1662 mSDtfsCounter, 3 mSDsluCounter, 4968 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 2 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6630 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:35,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6630 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1218 Invalid, 9 Unknown, 0 Unchecked, 41.5s Time] [2022-11-19 07:36:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2022-11-19 07:36:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 11335. [2022-11-19 07:36:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11335 states, 7763 states have (on average 1.4317918330542316) internal successors, (11115), 7885 states have internal predecessors, (11115), 2756 states have call successors, (2756), 828 states have call predecessors, (2756), 815 states have return successors, (2960), 2701 states have call predecessors, (2960), 2749 states have call successors, (2960) [2022-11-19 07:36:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11335 states to 11335 states and 16831 transitions. [2022-11-19 07:36:35,563 INFO L78 Accepts]: Start accepts. Automaton has 11335 states and 16831 transitions. Word has length 81 [2022-11-19 07:36:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:35,563 INFO L495 AbstractCegarLoop]: Abstraction has 11335 states and 16831 transitions. [2022-11-19 07:36:35,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 07:36:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 11335 states and 16831 transitions. [2022-11-19 07:36:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:36:35,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:35,573 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:36:35,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash -17816103, now seen corresponding path program 1 times [2022-11-19 07:36:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:35,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100089981] [2022-11-19 07:36:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:36:36,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:36,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100089981] [2022-11-19 07:36:36,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100089981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:36,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433679630] [2022-11-19 07:36:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:36,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:36,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:36,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:36:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:36:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:36:38,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:38,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433679630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:38,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:38,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-11-19 07:36:38,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748212277] [2022-11-19 07:36:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:38,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:36:38,452 INFO L87 Difference]: Start difference. First operand 11335 states and 16831 transitions. Second operand has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:36:41,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:44,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:36:46,295 WARN L539 Checker$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 07:36:51,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:53,111 WARN L539 Checker$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 07:36:54,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:57,978 WARN L539 Checker$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 07:36:59,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:02,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:03,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:05,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:08,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:10,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:13,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:19,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:37:21,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:37:23,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:37:25,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:37:26,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:37:30,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:39,809 WARN L539 Checker$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 07:37:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:45,463 INFO L93 Difference]: Finished difference Result 14739 states and 21855 transitions. [2022-11-19 07:37:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:37:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2022-11-19 07:37:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:45,602 INFO L225 Difference]: With dead ends: 14739 [2022-11-19 07:37:45,602 INFO L226 Difference]: Without dead ends: 14713 [2022-11-19 07:37:45,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:37:45,607 INFO L413 NwaCegarLoop]: 2361 mSDtfsCounter, 1607 mSDsluCounter, 6513 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 106 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 8874 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:45,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1646 Valid, 8874 Invalid, 3961 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [106 Valid, 3843 Invalid, 12 Unknown, 0 Unchecked, 66.4s Time] [2022-11-19 07:37:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14713 states. [2022-11-19 07:37:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14713 to 14557. [2022-11-19 07:37:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14557 states, 9926 states have (on average 1.428067700987306) internal successors, (14175), 10106 states have internal predecessors, (14175), 3561 states have call successors, (3561), 1084 states have call predecessors, (3561), 1069 states have return successors, (3885), 3478 states have call predecessors, (3885), 3554 states have call successors, (3885) [2022-11-19 07:37:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14557 states to 14557 states and 21621 transitions. [2022-11-19 07:37:46,340 INFO L78 Accepts]: Start accepts. Automaton has 14557 states and 21621 transitions. Word has length 87 [2022-11-19 07:37:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:46,341 INFO L495 AbstractCegarLoop]: Abstraction has 14557 states and 21621 transitions. [2022-11-19 07:37:46,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:37:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 14557 states and 21621 transitions. [2022-11-19 07:37:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:37:46,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:46,346 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 07:37:46,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:37:46,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1734225266, now seen corresponding path program 1 times [2022-11-19 07:37:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:46,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925349348] [2022-11-19 07:37:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:46,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:37:46,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970645053] [2022-11-19 07:37:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:46,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:37:46,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:37:46,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:37:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:48,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 3132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:37:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:37:48,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:48,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:48,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925349348] [2022-11-19 07:37:48,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:37:48,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970645053] [2022-11-19 07:37:48,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970645053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:48,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:48,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:37:48,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146577500] [2022-11-19 07:37:48,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:48,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:37:48,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:37:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:37:48,356 INFO L87 Difference]: Start difference. First operand 14557 states and 21621 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:37:50,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:51,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:52,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:54,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:56,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:37:59,544 WARN L539 Checker$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 07:38:00,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:02,659 WARN L539 Checker$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 07:38:04,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:06,671 WARN L539 Checker$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 07:38:08,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:10,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:13,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:20,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:38:22,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:38:26,304 WARN L539 Checker$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 07:38:28,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:34,799 WARN L539 Checker$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 07:38:38,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:38,386 INFO L93 Difference]: Finished difference Result 32557 states and 48912 transitions. [2022-11-19 07:38:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:38:38,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 91 [2022-11-19 07:38:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:38,448 INFO L225 Difference]: With dead ends: 32557 [2022-11-19 07:38:38,448 INFO L226 Difference]: Without dead ends: 18024 [2022-11-19 07:38:38,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:38:38,496 INFO L413 NwaCegarLoop]: 2307 mSDtfsCounter, 458 mSDsluCounter, 6361 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 1 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 8668 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:38,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 8668 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1498 Invalid, 10 Unknown, 0 Unchecked, 49.3s Time] [2022-11-19 07:38:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18024 states. [2022-11-19 07:38:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18024 to 14579. [2022-11-19 07:38:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14579 states, 9944 states have (on average 1.4272928399034595) internal successors, (14193), 10121 states have internal predecessors, (14193), 3561 states have call successors, (3561), 1084 states have call predecessors, (3561), 1073 states have return successors, (3899), 3485 states have call predecessors, (3899), 3554 states have call successors, (3899) [2022-11-19 07:38:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14579 states to 14579 states and 21653 transitions. [2022-11-19 07:38:39,466 INFO L78 Accepts]: Start accepts. Automaton has 14579 states and 21653 transitions. Word has length 91 [2022-11-19 07:38:39,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:39,466 INFO L495 AbstractCegarLoop]: Abstraction has 14579 states and 21653 transitions. [2022-11-19 07:38:39,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:38:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 14579 states and 21653 transitions. [2022-11-19 07:38:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 07:38:39,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:39,472 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 07:38:39,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:39,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:38:39,683 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:39,683 INFO L85 PathProgramCache]: Analyzing trace with hash -92354423, now seen corresponding path program 1 times [2022-11-19 07:38:39,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:39,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345599683] [2022-11-19 07:38:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:39,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:39,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:38:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795528824] [2022-11-19 07:38:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:39,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:39,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:39,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:39,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:38:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 3136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:38:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:38:41,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:41,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:41,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345599683] [2022-11-19 07:38:41,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:38:41,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795528824] [2022-11-19 07:38:41,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795528824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:41,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:41,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:38:41,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167771142] [2022-11-19 07:38:41,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:41,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:38:41,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:41,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:38:41,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:41,548 INFO L87 Difference]: Start difference. First operand 14579 states and 21653 transitions. Second operand has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:38:45,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:38:53,637 WARN L539 Checker$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 07:38:54,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:56,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:58,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:00,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:02,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:03,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:05,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:06,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:08,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:09,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:12,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:14,015 WARN L539 Checker$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 07:39:17,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:25,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:27,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:29,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:31,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:33,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:35,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:38,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:39,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:41,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:39:44,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:52,682 WARN L539 Checker$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 07:39:59,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:59,945 INFO L93 Difference]: Finished difference Result 15588 states and 23205 transitions. [2022-11-19 07:39:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:39:59,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2022-11-19 07:39:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:00,020 INFO L225 Difference]: With dead ends: 15588 [2022-11-19 07:40:00,020 INFO L226 Difference]: Without dead ends: 15585 [2022-11-19 07:40:00,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:40:00,032 INFO L413 NwaCegarLoop]: 2362 mSDtfsCounter, 1173 mSDsluCounter, 7094 mSDsCounter, 0 mSdLazyCounter, 3341 mSolverCounterSat, 70 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 9456 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3341 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:00,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 9456 Invalid, 3423 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [70 Valid, 3341 Invalid, 12 Unknown, 0 Unchecked, 77.7s Time] [2022-11-19 07:40:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2022-11-19 07:40:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 15119. [2022-11-19 07:40:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15119 states, 10312 states have (on average 1.42988750969744) internal successors, (14745), 10505 states have internal predecessors, (14745), 3673 states have call successors, (3673), 1144 states have call predecessors, (3673), 1133 states have return successors, (4096), 3585 states have call predecessors, (4096), 3666 states have call successors, (4096) [2022-11-19 07:40:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15119 states to 15119 states and 22514 transitions. [2022-11-19 07:40:01,037 INFO L78 Accepts]: Start accepts. Automaton has 15119 states and 22514 transitions. Word has length 92 [2022-11-19 07:40:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:01,038 INFO L495 AbstractCegarLoop]: Abstraction has 15119 states and 22514 transitions. [2022-11-19 07:40:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:40:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15119 states and 22514 transitions. [2022-11-19 07:40:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 07:40:01,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:01,050 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-11-19 07:40:01,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:01,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:01,266 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash 163153399, now seen corresponding path program 1 times [2022-11-19 07:40:01,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:01,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629808885] [2022-11-19 07:40:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:01,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:40:01,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611862867] [2022-11-19 07:40:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:01,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:01,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:01,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:01,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:40:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:03,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:40:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:40:03,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:40:03,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629808885] [2022-11-19 07:40:03,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:40:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611862867] [2022-11-19 07:40:03,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611862867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:03,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:40:03,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:40:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763634550] [2022-11-19 07:40:03,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:03,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:40:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:40:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:40:03,514 INFO L87 Difference]: Start difference. First operand 15119 states and 22514 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-19 07:40:06,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:40:08,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:11,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:13,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:16,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:40:18,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:22,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:24,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:26,739 WARN L539 Checker$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 07:40:28,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:30,858 WARN L539 Checker$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 07:40:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:33,353 INFO L93 Difference]: Finished difference Result 17725 states and 26605 transitions. [2022-11-19 07:40:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:40:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 120 [2022-11-19 07:40:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:33,424 INFO L225 Difference]: With dead ends: 17725 [2022-11-19 07:40:33,424 INFO L226 Difference]: Without dead ends: 17720 [2022-11-19 07:40:33,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 118 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 07:40:33,435 INFO L413 NwaCegarLoop]: 1911 mSDtfsCounter, 1654 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:33,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1668 Valid, 3460 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 596 Invalid, 6 Unknown, 0 Unchecked, 29.1s Time] [2022-11-19 07:40:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17720 states. [2022-11-19 07:40:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17720 to 17606. [2022-11-19 07:40:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17606 states, 12029 states have (on average 1.4310416493474105) internal successors, (17214), 12272 states have internal predecessors, (17214), 4241 states have call successors, (4241), 1341 states have call predecessors, (4241), 1335 states have return successors, (4826), 4122 states have call predecessors, (4826), 4234 states have call successors, (4826) [2022-11-19 07:40:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17606 states to 17606 states and 26281 transitions. [2022-11-19 07:40:34,354 INFO L78 Accepts]: Start accepts. Automaton has 17606 states and 26281 transitions. Word has length 120 [2022-11-19 07:40:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:34,354 INFO L495 AbstractCegarLoop]: Abstraction has 17606 states and 26281 transitions. [2022-11-19 07:40:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-19 07:40:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17606 states and 26281 transitions. [2022-11-19 07:40:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:40:34,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:34,367 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:34,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:34,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:40:34,582 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash -845223673, now seen corresponding path program 1 times [2022-11-19 07:40:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:34,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552234541] [2022-11-19 07:40:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:40:35,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:35,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552234541] [2022-11-19 07:40:35,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552234541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:35,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:40:35,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:40:35,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649423603] [2022-11-19 07:40:35,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:35,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:40:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:40:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:40:35,083 INFO L87 Difference]: Start difference. First operand 17606 states and 26281 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:40:38,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:40:41,424 WARN L539 Checker$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 07:40:43,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:44,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:46,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:48,711 WARN L539 Checker$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 07:40:51,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:40:53,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:40:56,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:58,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:01,327 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 07:41:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:03,270 INFO L93 Difference]: Finished difference Result 26518 states and 39553 transitions. [2022-11-19 07:41:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:41:03,271 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 127 [2022-11-19 07:41:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:03,333 INFO L225 Difference]: With dead ends: 26518 [2022-11-19 07:41:03,333 INFO L226 Difference]: Without dead ends: 17608 [2022-11-19 07:41:03,357 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 07:41:03,357 INFO L413 NwaCegarLoop]: 1654 mSDtfsCounter, 0 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:03,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3306 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 599 Invalid, 7 Unknown, 0 Unchecked, 27.6s Time] [2022-11-19 07:41:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17608 states. [2022-11-19 07:41:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17608 to 17608. [2022-11-19 07:41:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17608 states, 12031 states have (on average 1.4309699941816973) internal successors, (17216), 12274 states have internal predecessors, (17216), 4241 states have call successors, (4241), 1341 states have call predecessors, (4241), 1335 states have return successors, (4826), 4122 states have call predecessors, (4826), 4234 states have call successors, (4826) [2022-11-19 07:41:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17608 states to 17608 states and 26283 transitions. [2022-11-19 07:41:04,344 INFO L78 Accepts]: Start accepts. Automaton has 17608 states and 26283 transitions. Word has length 127 [2022-11-19 07:41:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:04,345 INFO L495 AbstractCegarLoop]: Abstraction has 17608 states and 26283 transitions. [2022-11-19 07:41:04,345 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:41:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 17608 states and 26283 transitions. [2022-11-19 07:41:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 07:41:04,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:04,356 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:04,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:41:04,356 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:04,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1433872131, now seen corresponding path program 1 times [2022-11-19 07:41:04,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:04,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511979012] [2022-11-19 07:41:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:04,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:41:04,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511979012] [2022-11-19 07:41:04,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511979012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91911624] [2022-11-19 07:41:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:04,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:04,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:04,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:41:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:06,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 3711 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:41:06,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:41:06,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:41:06,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91911624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:41:06,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:41:06,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:41:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455059087] [2022-11-19 07:41:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:06,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:41:06,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:06,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:41:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:41:06,990 INFO L87 Difference]: Start difference. First operand 17608 states and 26283 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:41:08,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:09,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:11,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:41:14,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:17,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:20,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:23,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:41:25,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:41:27,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:30,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:34,221 WARN L539 Checker$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 07:41:36,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:37,176 INFO L93 Difference]: Finished difference Result 27743 states and 41607 transitions. [2022-11-19 07:41:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:41:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 129 [2022-11-19 07:41:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:37,242 INFO L225 Difference]: With dead ends: 27743 [2022-11-19 07:41:37,242 INFO L226 Difference]: Without dead ends: 18831 [2022-11-19 07:41:37,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:41:37,265 INFO L413 NwaCegarLoop]: 1753 mSDtfsCounter, 399 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 5 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 3282 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:37,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 3282 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 606 Invalid, 6 Unknown, 0 Unchecked, 29.4s Time] [2022-11-19 07:41:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18831 states. [2022-11-19 07:41:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18831 to 18717. [2022-11-19 07:41:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18717 states, 12842 states have (on average 1.43560193116337) internal successors, (18436), 13103 states have internal predecessors, (18436), 4539 states have call successors, (4539), 1341 states have call predecessors, (4539), 1335 states have return successors, (5157), 4415 states have call predecessors, (5157), 4532 states have call successors, (5157) [2022-11-19 07:41:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18717 states to 18717 states and 28132 transitions. [2022-11-19 07:41:38,219 INFO L78 Accepts]: Start accepts. Automaton has 18717 states and 28132 transitions. Word has length 129 [2022-11-19 07:41:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:38,220 INFO L495 AbstractCegarLoop]: Abstraction has 18717 states and 28132 transitions. [2022-11-19 07:41:38,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:41:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18717 states and 28132 transitions. [2022-11-19 07:41:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-19 07:41:38,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:38,227 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:38,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:38,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:41:38,442 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:38,443 INFO L85 PathProgramCache]: Analyzing trace with hash 245816226, now seen corresponding path program 1 times [2022-11-19 07:41:38,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:38,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477027487] [2022-11-19 07:41:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:38,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:41:38,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477027487] [2022-11-19 07:41:38,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477027487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933795743] [2022-11-19 07:41:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:38,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:38,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367ac7b0-783e-4358-8434-610900ef570a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:41:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:40,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 3685 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:41:40,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:41:40,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:41:41,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933795743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1712370189] [2022-11-19 07:41:41,151 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2022-11-19 07:41:41,151 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:41,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:41,161 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:41,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:13,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:13,406 INFO L217 Elim1Store]: Index analysis took 417 ms [2022-11-19 07:42:25,015 WARN L233 SmtUtils]: Spent 11.55s on a formula simplification. DAG size of input: 1272 DAG size of output: 835 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:42:25,018 INFO L321 Elim1Store]: treesize reduction 1438, result has 46.3 percent of original size [2022-11-19 07:42:25,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 142 select indices, 142 select index equivalence classes, 10013 disjoint index pairs (out of 10011 index pairs), introduced 142 new quantified variables, introduced 141 case distinctions, treesize of input 717 treesize of output 1678 [2022-11-19 07:42:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:29,286 INFO L217 Elim1Store]: Index analysis took 629 ms [2022-11-19 07:42:46,365 WARN L233 SmtUtils]: Spent 17.04s on a formula simplification. DAG size of input: 1556 DAG size of output: 849 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:42:46,368 INFO L321 Elim1Store]: treesize reduction 2538, result has 33.4 percent of original size [2022-11-19 07:42:46,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 144 select indices, 144 select index equivalence classes, 10155 disjoint index pairs (out of 10296 index pairs), introduced 144 new quantified variables, introduced 282 case distinctions, treesize of input 727 treesize of output 1717